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Old 11-11-2002, 03:34 PM
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Post is a 307 worth using?

this free 327 I had lined up? well I went to pick it up tonight, and turns out to be a 307 casting # 3970020 from 70-73. it had a set of heads that has a casting # 333882.

is this engine worth doing anything with? looks like it has a little smaller bore, and same stroke as a 327.

will these heads work for this engine (with some custom porting work)?

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Old 11-11-2002, 04:00 PM
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the 307 is junk. keep the 882 heads. keep the crank and rods. trade them, sell them or build a 327. the 882 heads are good street heads if they are converted to 1.94 or larger valves.
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Old 11-11-2002, 04:27 PM
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the 307 is a 283 with a 327 crank,have it sonic tested to see if you can punch it out .125. if so build a 327. although there are cheeper ways to build power,the 327 has an almost ideal rod/stoke ratio for acceleration
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Old 11-11-2002, 04:47 PM
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The 307 is a great little motor we run one in a 4x4 wrecker for 8 years till we sold it, It was free at the time.We did simple rebuild, 30 over flat top cast pistons and a RV type cam and the 882 heads.Very cheap rebuild and run the sheet out of it.Went threw 2 GM rebuilt BBs befor that. I just had to stickup for the 307.

[ November 11, 2002: Message edited by: roys63 ]</p>
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Old 11-11-2002, 05:19 PM
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I have heard that the 882 heads aren't good heads because they are prone to crack! Is this true??
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Old 11-11-2002, 05:31 PM
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Thats what i Hear all the time allso. but i never had any problems with them.There is a set on my old pu,had a set on my old blower motor overheated it big time a few times never had a problem with them!on a camaro now , how may sets do you think are on the road right now 2 or 3 million+?

[ November 11, 2002: Message edited by: roys63 ]</p>
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Old 11-11-2002, 05:45 PM
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I started running some dyno numbers on this engine. kicks the crap out of a 305.

I think I'm going to keep this engine, and rebuild it. I will be doing another hotrod, but this will be a family traveler only. I'm planning on doing a late 30's 4 door, and depending on weight this may be a perfect engine for that project.

drop that in with a 700r4, and a low gear ratio like 3.73's or something. could be a good engine for that situation.
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Old 11-11-2002, 05:58 PM
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yes the 882 heads are prone to crack but if you get a good set they are one of the best flowing of the 70's regular production heads,just don't get them hot
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Old 11-11-2002, 05:58 PM
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Back when I was in high school I had a Nova (70 or 71) with a 307ci Turbo Fire (actually said that on the air cleaner). I don't know about boring, stroking, or anything else with this particular engine but I will say I beat the tar out of that 307 Nova and she never gave me an ounce of trouble, at least until that tree got in my way <img src="graemlins/drunk.gif" border="0" alt="[drunk]" /> .
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Old 11-11-2002, 07:38 PM
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shipped curb weight of the late 30's cars is 3,000 pounds...

I think I've got an engine when I finally get my hands on one of those project vehicles!
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Old 11-11-2002, 08:32 PM
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I like 307`s, great engine. I keep as many I can get, mostly to use the crank in a 350 to make a 327, but the 307 alone with the right pieces is no slouch. it can be made to have decent power and milage. The 882 castings are junk, i have 2 sets, both cracked. the intake port is irregular shaped and does no permit the mixture to flow very well at high RPM`s, run a finger in the intake port of a 882 and you`ll feel a hole in the runner to the side, these heads are good to learn the art of porting on before they hit the trash and that`s about it, prone to cracking and they run hotter due to the twin heat riser passages, if I had to run a smog head, I`d run the 993 or the 997 casting, these are heavy duty castings and they work decent. Just my 2 cents.
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Old 11-12-2002, 09:07 AM
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i saw this in the august issue of hotrod buy a setof keith black hypereutectics(PN KB165 with a 6cc dish or KB166 with 4cc dome with a compression height of 1.805 . to make the pistons work with the extra 0.250" stroke(compared to a 283), just use stock 400 rods which are the shortest OE rods at 5.565". Short rods are usually a bad plan but with such a short stroke , the rod ratio is still 1.71:1.Better than a stoke 350s. Mill the block 0.025 for a deck height of 9.000 and your piston to deck clearance will be 0.005. At .030overbore the engine will be a 311ci, and if you use the 4cc pistons with 64cc heads then youll have about 10.0:1compression if you put the right cam and intake on you could build 350hp very cheaply thats what i read in the magizine thanks denny :p
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