That’s something I’ve not seen done! I’d like to see the numbers on a 307 with head and cam swap capped off with a blower! Will the bottom end hold out?
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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.

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.

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

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?

Re: Camel Hump Heads on a 307???
 

Lighten up Francis... :)

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.

Re: Camel Hump Heads on a 307???
 

No 3/4 race cam suggested? You guys are slacking...

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.

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/

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.

Re: Camel Hump Heads on a 307???
 

A few random scattered thoughts...

There is something cool about the look of the classic old-school Camel hump heads.
One or two companies make brand new heads with the Camel markings.
Cheaper to just buy those brand new because after all of the machining is done, used heads cost more.

You will get more bang for the buck with Vortec heads if you want to rev it high enough.
Remember to shorten the tops of the valve guides for higher lift cams, otherwise you'll risk an interference problem. There is also a risk that junkyard heads might be cracked, so watch for that.

That Roots blower would definitely wake up any engine and provide awesome visual appeal.

Re: Camel Hump Heads on a 307???
 

This is a low budget build if there is a such thing, lol. If I can find a set of heads that are flat and not cracked I can redo them, probably will have to get them resurfaced though. If I use the vortecs I will use the beehive springs or buy the tool to cut down the bosses. I gave away a nice set of 041 heads that had just been redone because they didn't have accessory holes. Now I wish I had kept them.

Re: Camel Hump Heads on a 307???
 

Sounds like a good plan.

Re: Camel Hump Heads on a 307???
 

Vortec heads on a 307 should result in abysmal compression without changing pistons, and there goes your cheap build idea.

Re: Camel Hump Heads on a 307???
 

The article I linked earlier says 307 heads had 70cc's and Vortec heads are 64cc. Obviously a guy cant just believe every article he reads on the web, but it was written by an editor for Carcraft who has authored books on small block Chevy performace. Unfortunately for guys like me who lack real world engine builing experience, we have to turn to the Web and read thru multiple pages to research the building of a modified engine. I did that here on this site about a decade ago when I wanted my 283 rebuilt. I was greatful for the many active posters we had at that time who willingly shared professional grade knowledge about an engine that ceased production when I was still watching Sesame Street.

Re: Camel Hump Heads on a 307???
 

What makes you think that? It's a step up from the 76 cc(correction 70 cc) heads that were on it and they flow a heck of a lot better. I figure with more compression, better flow, and a bigger cam it should do ok.
Edit, It already has flattop pistons with four valve reliefs, I don't see where changing pistons is going to do much for compression.
I was looking at some cheap Chinese heads with 59 cc chambers but I figure I would be better off to stick with the proven vortecs and 64 cc chambers and better flow

Re: Camel Hump Heads on a 307???
 

Well crap, I thought they had 305 type heads on them. My mistake.

Re: Camel Hump Heads on a 307???
 

No problem, the 305 heads are my second choice. I figure if I stick with vortecs I can always switch them over to a 350 if the 307 doesn't work out.
(Just checked and my old heads are 70 cc chambers)

Re: Camel Hump Heads on a 307???
 

Your proposed 307 build is real close to how I want to build one one of these days. I'm not one of those that hate all small inch small blocks like some do. I've been around a couple 307's that would surprise a lot of people. Here is one build thread on this forum.

http://www.67-72chevytrucks.com/vboa...d.php?t=429865

And here's a video with the XE262 cam.

https://www.youtube.com/watch?v=tWyjDNk8dfo

Re: Camel Hump Heads on a 307???
 

But won't 305 heads really jack the CR up high?