Camel Hump Heads on a 307???
Can it be done? Would there be any performance gain with putting them on over the stock heads? If so which ones should I put on, casting numbers.
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Re: Camel Hump Heads on a 307???
It can be done....use 1.94 intake valve for safe measure. 186 and 461 are 2 good castings, they have accessory bolt holes. Will you pick up any power?? I don't think it would be worth the change.
Most of the time the cost of refurbishing the old heads don't make sence. Vortec heads are cheaper and out perform the camel humps. After market heads are the way to go for performance. I'm sure you've heard all of the"why would you hop up a 307" sayings...so I won't go there...lol I built up the 283 that came with my truck with camel humps and stuff...with the thought that when I go to a 350 I could bolt on the parts from the 283. Well the parts didn't work well on the 283...and after I had a 1,000.00 in the 186 heads(which I sold for 500.00) I changed all of the parts for the 350. anyways...make a plan and stick to it... |
Re: Camel Hump Heads on a 307???
Well "Spyder-Dude" has some double hump and LT1 heads for sale that he says are "just freshened" I've asked him what that all includes, no response yet, for $200 and $175 respectively. So if they are good heads for that price is there any performance gain over stock? I'm on a real tight budget and won't spend much if I don't have to. I'm just trying to spice it up a bit, and I here heads is the way to go, along with carb, intake, cam, and all that good stuff, but I have that all figured out.
So if you can point me towards a cheap, <$300, set of good heads that would be much appreciated. |
Re: Camel Hump Heads on a 307???
I can't imagine your 307 is outbreathing what's already there unless it's pretty darn warm.
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Re: Camel Hump Heads on a 307???
Well I'm planning on spicing up the engine a bit and heard that different cylinder heads would really help that matter.
So would camel hump heads or LT1 heads be any of a performance gain over the stock heads? |
Re: Camel Hump Heads on a 307???
go for it, I think its pretty kick a$$ that your hoppin up a 307, but you'lle have to rev it up pretty high to make getting s set of heads workwored and ported worth your while because a 307 doesnt flow alot of air due to small cubic inches.
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Re: Camel Hump Heads on a 307???
I'm planning on putting on a Holley Street Dominator Intake with a holley 4160 600cfm vac secondaries, a new cam, not quiet for sure about all the lifts and duration yet, headers, true dual exhaust. Something like that. And I'm not for sure what stock heads can except in the way of lift, so that is one reason, and having my heads machined and everything probably cost more than I'm willing to pay.
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Re: Camel Hump Heads on a 307???
Oh yes!!! I will take any suggestions at all on anything. Any recommended cams, carbs, intakes, rebuild kits. Any suggestions would be most appreciated. This is my first build so I'd don't know very much at all.
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Re: Camel Hump Heads on a 307???
My 461 don't have accy. holes,keep an eye out I have seen the newer vortec go for $300 a set here.But if you get the vortec remember you have to run a vortec intake as the center holes are different angel
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Re: Camel Hump Heads on a 307???
Nice, close enough to call it one h.p per cube. I love thrashing on a small sbc
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Re: Camel Hump Heads on a 307???
I doubt he's still looking to build 13yrs later.....
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Re: Camel Hump Heads on a 307???
Might up the horsepower from 99 to 105.
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Re: Camel Hump Heads on a 307???
In all honesty it would probably lose HP. The 307 cam has to be the worst one ever installed from the factory. When they used it in the 400 2v it made something like 190hp. I think the stock heads never met max flow. Even 13 years later.
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Re: Camel Hump Heads on a 307???
307. Lol
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Re: Camel Hump Heads on a 307???
Why so much hate for the 307? they respond to a head and cam upgrade just as any small block does. Not everyone has to have a 500 hp small block.
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Re: Camel Hump Heads on a 307???
1 Attachment(s)
Attachment 1970050this will wake up a 307..
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Never was a 262 sbc! Non exist! |
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Re: Camel Hump Heads on a 307???
Wrong! Know your SBC motors before you type! 262, 265, 267, 283, 305, 307, 327, 350 and 400. In 1975 and 1976 they made a 262 ci sbc.
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Re: Camel Hump Heads on a 307???
Are you absolutely sure!
Ever seen one? |
Re: Camel Hump Heads on a 307???
Yes, positive! I had one in a mid 70’s 2dr Caprice. It was Chevys last effort to make a small displacement V8 for full and mid size cars due to mandates on emissions and fuel economy.
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Re: Camel Hump Heads on a 307???
Are you sure?
Not in full size. Monza or nova had them. You’re confused with a 267. By the way you left out an important cubic inch size in your list. Do you happen to know where I could find a 4 bolt 327? |
Re: Camel Hump Heads on a 307???
Yeah I realized I left out the 302 after I posted it. I’ll keep my eyes open for a 327 4bolt. Buddy of mine is building one with fuel injected tunnel ram to go in his C10
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Re: Camel Hump Heads on a 307???
You do know those 327 4 bolt’s were never produced.
I was just funnin’ with you! Kinda like the super rare 5 bolt main NASCAR 350. |
Re: Camel Hump Heads on a 307???
Yes I do know GM didn’t make a 327 4 bolt main bearing motor factory but it doesn’t mean you can’t find one. What engine would you have if you ran a large journal 327 crank in a 350 4bm Block?
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Re: Camel Hump Heads on a 307???
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Gary |
Re: Camel Hump Heads on a 307???
Chevy produced the 262 two different times. The first time was in the mid '70's. I wanna say '74-'77? Mainly in the Monza and the Nova. The second time was '94-'96 as a GEN II small block for the Caprice's.
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Re: Camel Hump Heads on a 307???
No 3/4 race cam suggested? You guys are slacking...
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Re: Camel Hump Heads on a 307???
The 307 truck motors were good motors. The problem is why rebuild one when you can start with a 350 block and be way ahead from the get go.
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Re: Camel Hump Heads on a 307???
Ok, let's get this old thread to going again. About 5 years ago I pulled the 307 out my 70 C10 with the intention of rebuilding it. Then I found I could get a brand new L31-R vortec for what it would cost to build the 307 the way I wanted. I stuck the 307 short block against the wall between two work benches and forgot about it. Now I'm not working so I decided to pull the 307 out and put it on the motor stand.
I'm thinking of putting new bearings and rings in it with a set of vortec heads and a comp XE262 cam. Not looking for a high dollar big HP build just a street motor and hoping for 300 hp. I don't even have anything to put it in now but would like to find a small pickup later. I dont care if it's an S10, Toyota, Mazda, or whatever as long as it's not a Ford, lol. I'm just in the research and looking for parts stage right now. Need to find some heads before I do anything else. How do you all think the 307 will do with vortec heads a mild cam, maybe a 650 holley, and hei distributor. Oh, you can blame my cousin for this went to his house and he is working on a 283 he literally dug out the ground 25 years ago. |
Re: Camel Hump Heads on a 307???
I think it sounds fun...dare to be different. Someone else in this thread said "I love thrashin' on a small SBC" and i couldn't agree more. In my not too confident opinion, I think the compression ratio would be rather crucial . I am unaware of what the original 307 heads cc'd at, but wouldn't you want that thing to be at least 9 to1 when all is said and done? Did you read this one yet.... https://www.onallcylinders.com/2020/...blowing-it-up/
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Re: Camel Hump Heads on a 307???
This will be a long term project but once I find some heads I plan to get it going. I'm hoping to find some used vortecs that aren't cracked but that isn't so easy as they are prone to cracks around the exhaust ports. I may use camel humps or 305 heads depending on what I can find but rather have vortecs. My cousin has a lunati cam with 454 lift and a 106 lsa in one of his trucks that runs good and has a nice sounding idle. Don't really care for the lumpy idle but this is just a fun project to see what I can make out of an old 307. Just for the nay-sayers I know starting with a 350 would be more practical but I already have a nice 350 in my truck this is just for the fun of it.
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