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12-14-2019, 09:45 PM | #51 |
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Re: 350 GM Crate Motor questions for a 66 C10
I said might need!
Depends which carb. Which pump? How much pressure? |
12-14-2019, 11:22 PM | #52 |
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Re: 350 GM Crate Motor questions for a 66 C10
The carb I have is a quadrajet and the pump is the
Holley Mighty Mite Electric Fuel Pump 12-427 at 7psi. https://www.summitracing.com/parts/HLY-12-427 Last edited by msg; 12-14-2019 at 11:41 PM. |
12-15-2019, 09:58 AM | #53 |
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Re: 350 GM Crate Motor questions for a 66 C10
Quadrajet might handle 7 psi. I’ve seen some that did and some that didn’t.
I always plan for 5 psi. Never a problem like that. Easy to run a return line now while you have lots of room to install it. Just cap it off on the ends. Hook it up later if needed. |
12-15-2019, 10:16 AM | #54 |
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Re: 350 GM Crate Motor questions for a 66 C10
Thanks Geezer, Ill look for return line references since Ive never dealt with any of this before.
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12-15-2019, 05:25 PM | #55 | |
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Re: 350 GM Crate Motor questions for a 66 C10
Quote:
Just making sure you realize that you will need to make a double flare fitting for a sturdy connection. The link will have a pic showing it in more detail in the tool's description . BTW, most of the car and truck mags give this Eastwood tool "two thumbs up" in their articles on DIY brakelines and such. Last edited by AcampoDave; 12-15-2019 at 05:34 PM. |
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12-19-2019, 06:36 PM | #56 |
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Re: 350 GM Crate Motor questions for a 66 C10
Thanks Dave on the double flare info. Theres a good bit more stuff Ill need like a coil straightener tool as well. Things are racking up.
I was looking over the engine parts I still do not have and the gaskets are what Im ordering now. For the fuel pump I guess I need a block off plate, is this the right fit for that engine? https://www.amazon.com/Spectre-Perfo...7VXCHKEWD9RMPA I think these are correct The exhaust https://www.summitracing.com/parts/fel-1404 Intake https://www.summitracing.com/parts/fel-1255 Water pump https://www.summitracing.com/parts/fel-5152/overview/ |
12-19-2019, 10:23 PM | #57 |
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Re: 350 GM Crate Motor questions for a 66 C10
You should not need a fuel pump block off plate. The block is not machined for a mechanical fuel pump, so there won't be any oil leaking from that area.
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03-12-2020, 07:10 PM | #58 |
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Re: 350 GM Crate Motor questions for a 66 C10
Im getting close to mounting up the L31 to the 700r4 and I was looking to replace the bolts that mount the motor to the bracket and also the bolts that mount the bracket to the frame. I assumed it was best to replace the old bolts so I checked with Summit and they sent me 3 links saying I would need all three sets. One of the links has the motor mount bracket with the bolts. Would the old bracket for the 350 I had not fit the L31? The mount pads were replaced about year before I tore everything down so they are in decent shape.
Here are the bolts they said I would need https://www.summitracing.com/parts/arp-130-3106 https://www.summitracing.com/parts/clp-6372mp-sm https://www.summitracing.com/parts/arp-130-3105 |
03-12-2020, 07:26 PM | #59 |
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Re: 350 GM Crate Motor questions for a 66 C10
Nothing wrong with using new bolts but if your old bolts look ok you can re-use them. Why would you need new engine stand/brackets?
The L31 should bolt just the same as your old 350. |
03-12-2020, 09:23 PM | #60 | |
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Re: 350 GM Crate Motor questions for a 66 C10
Quote:
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Michael of the clan Hill, "Two Seventy Two's" 71 1-ton Dually 350 4-Speed 71 C/50 Grain Truck, 350 Split-Axle 4-Speed 02 3/4 ton Express 14 Indian Chief Vintage 1952 Ford 8N, "Only Ford Allowed On The Property" "Be American, Buy American" |
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03-12-2020, 09:39 PM | #61 |
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Re: 350 GM Crate Motor questions for a 66 C10
There is no reason to not use your original engine mounts and the frame brackets. The L31 is still a Gen I small block. It is physically exactly the same as the old engine you had. You also do not have to buy ARP bolts. You can also simply go to your local hardware store and buy the correct size of grade 8 bolts, washers and nuts if needed.
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03-12-2020, 09:52 PM | #62 |
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Re: 350 GM Crate Motor questions for a 66 C10
You don't need those motor stands and bolts. Why not use what you have? Get a new set of these with 6-1"-3/8"-16 grade-5 bolts, and 2,1-1/4"-7/16-14 grade -5 bolts...Use your factory stands. https://www.summitracing.com/parts/a...make/chevrolet I'd forgo the regulator because that fuel filter should locate between the pump and the carb, and I'd either get another one just like it or one that's a little larger to locate on the frame between the tank and the pump. That will keep your pump alive and wont have to change out the small one so often. With those inline filters and only 7 psi your Quadrajet should be fine, it has it's own filter as well.
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Michael of the clan Hill, "Two Seventy Two's" 71 1-ton Dually 350 4-Speed 71 C/50 Grain Truck, 350 Split-Axle 4-Speed 02 3/4 ton Express 14 Indian Chief Vintage 1952 Ford 8N, "Only Ford Allowed On The Property" "Be American, Buy American" Last edited by Ironangel; 03-12-2020 at 10:24 PM. |
03-13-2020, 12:24 PM | #63 |
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Re: 350 GM Crate Motor questions for a 66 C10
Thanks guys, I had pulled the motor about 5 years ago and prior to that the mounts were replaced a year before that. Ill attach a pic of those, with a light clean they look like the summit ones in the 360 view. The brackets I had sandblasted and epoxy primered a while ago and pulled them out of storage. I will reuse them since they should work. The bolts and washers I stored after pulling Ill attach pics of as well. The bolts Summit sent me links to are way longer. Thats where I was mostly concerned. Looks like there were some spacers used on the mount to engine bolts. One was bigger than the other.
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03-13-2020, 02:27 PM | #64 | |
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Re: 350 GM Crate Motor questions for a 66 C10
Quote:
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Michael of the clan Hill, "Two Seventy Two's" 71 1-ton Dually 350 4-Speed 71 C/50 Grain Truck, 350 Split-Axle 4-Speed 02 3/4 ton Express 14 Indian Chief Vintage 1952 Ford 8N, "Only Ford Allowed On The Property" "Be American, Buy American" |
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03-20-2020, 05:33 PM | #65 | |
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Re: 350 GM Crate Motor questions for a 66 C10
Quote:
The specs I was looking for are for flexplate to torque converter flexplate to crankshaft Bell housing to motor engine mount to motor engine mount to brace brace to frame From the 62 shop manual it says 60 to 70 ft lbs on the mount to motor bolt for the 409 and 358 engines. Doesnt say the torque spec for the other bolts on that mount to motor. Thats all I can find so far, anybody have a reference for what I listed above? Last edited by msg; 03-20-2020 at 06:32 PM. |
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03-22-2020, 05:22 PM | #66 |
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Maybe its not an L31 - help!
Might be nothing but I am seeing L46 on stickers that are on the engine and I dont know if I should be concerned since what I ordered in the part description says "Replacement L31 engine with an engine code R. This engine has no mechanical fuel pump provision."
The part number 12681432 is what I ordered here which says "not available" nowdays. https://www.summitracing.com/parts/NAL-12681432 I contacted Summit and asked and they said that Chevrolet Performance will have to answer why the L46 vs L31. So tomorrow Ill hear what they can tell me. Maybe its no big deal and its still the vortec head L31 and the stickers say L46 for some other reason. Im bummed cause I nearly have it installed today when I saw this as I was raising it out of the crate to mount up. |
03-22-2020, 05:23 PM | #67 |
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Re: 350 GM Crate Motor questions for a 66 C10
Here is what it says on my invoice
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03-22-2020, 09:27 PM | #68 |
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Re: 350 GM Crate Motor questions for a 66 C10
Sorry for the late response, don't get bummed out because an L46 is the Corvette RPO number for the same L31 350 ci Vortec V8... https://www.google.com/search?q=gm+l...+specs&ie=&oe= Somebody else on the board here just installed that same motor and was pretty happy with it, might be able to find it in the search box above? A carbed Vortec will require an intake manifold designed for a carb, a spreadbore design in your case since your using the greatest carb ever made, a Quadrajet. Do your research, when you get that thing running your going to smile and realize you bought the right motor... A 1/4-20 bolt gets 10 ft lbs, double that for 5/16-18 bolts, 20 ft. lbs. Double that for 3/8-16 bolts, 40 ft. lbs. 7/16-14 bolts get 60 ft. lbs and 1/2-13 gets 90 ft lbs. Those are grade-5 specs. Unless your using a specified nut you don't need grade-8 bolts. A grade-8 bolt used in a shallow threaded cast iron hole such as a motor mount hole can lead to BIG trouble!
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Michael of the clan Hill, "Two Seventy Two's" 71 1-ton Dually 350 4-Speed 71 C/50 Grain Truck, 350 Split-Axle 4-Speed 02 3/4 ton Express 14 Indian Chief Vintage 1952 Ford 8N, "Only Ford Allowed On The Property" "Be American, Buy American" Last edited by Ironangel; 03-23-2020 at 09:54 AM. |
03-22-2020, 10:05 PM | #69 | |
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Re: 350 GM Crate Motor questions for a 66 C10
The L30 and L31 Vortec small blocks were not TBI. They were CPI/CSFI.
Quote:
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03-22-2020, 10:35 PM | #70 | |||
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Re: 350 GM Crate Motor questions for a 66 C10
Quote:
Quote:
Quote:
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03-25-2020, 11:03 PM | #71 |
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Re: 350 GM Crate Motor questions for a 66 C10
A grade 5 bolt will twist off (break) before it strips the threads or cracks the block. You should always use lock washers and on them thin mounting surfaces of the motor mounts it wouldn't hurt to use a flat washer as well.
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Michael of the clan Hill, "Two Seventy Two's" 71 1-ton Dually 350 4-Speed 71 C/50 Grain Truck, 350 Split-Axle 4-Speed 02 3/4 ton Express 14 Indian Chief Vintage 1952 Ford 8N, "Only Ford Allowed On The Property" "Be American, Buy American" |
03-26-2020, 10:23 AM | #72 |
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Re: 350 GM Crate Motor questions for a 66 C10
Thanks I could add the washers but now that the engine is installed it will be tight access. I wasnt seeing the lock washer in the shop manual diagrams for the 3 bolts that mount the pad to the engine so I tried it without for a start. There was a rear mount though that had some tabs that were meant to bend over the bolt head.
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03-26-2020, 10:43 AM | #73 |
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A few attempts
Im sure theres a better/right way to have done the install but its in now. First I looked back at the pictures I took 5 years ago when I pulled the engine and transmission. I had the adjuster leveling bar with the handle pointed to the rear and the bolt on the arm at the 2 ton mark. I figured moving it to the 1 1/2 spot would make it easier so I decided to move it out a notch this time.
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03-26-2020, 10:45 AM | #74 |
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attempt 1
As I got to raising it high enough to clear the front end I saw the handle was not going to work at that end. So I had to lower it back to the crate and reassemble the lever bar
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03-26-2020, 10:47 AM | #75 |
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attempt 2
As I moved in and was lowering it in the lift wouldnt go any further forward, so I backed it out and lowered it to the crate and extended to the 1 ton mark.
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