Can I use 882 and 993 heads on 307 - Team Camaro Tech
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post #1 of 10 (permalink) Old Mar 28th, 08, 10:07 AM Thread Starter
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Can I use 882 and 993 heads on 307

I have my original 307 sitting in the corner of my garage and I want to rebuild it for fun, but don't want to spend a lot of $$ on this engine. I just installed a trickflow 420 top end kit on the 350 in my 69 camaro, but I have all these parts laying around and figure I could reuse most of this on the 307. The 307 needs a complete rebuild.

So I have one 882 head and one 993 head in excellent shape. I also have a performer cam which I kept the lifters/pushrods/and stamped rockers. I put them in a bag and numbered them so I won't need to break in my cam again. I also have a true double roller timing chain with chrome timing cover, a performer manifold, and performer 600 cfm carb. I also have a stock fuel pump, stock 6.25 harmonic balancer and pointer, stock oil pan and new oil pump, old chrome valve covers etc. This all came off my 350 and has less than 3000 miles. Basically I was going to get another set of heads and rebuild the 307 shortblock, but I can't seem to sell the heads. I figure if I can use them on the 307 provided I change the pistons i could probably rebuild this engine for cheap. Can these heads be used on a 307 or is the 76cc chamber way to big?

1969 Camaro 350, Trickflow heads, ST-10 4spd, Hotchkis suspension, Baer SS brake kit, moser 12bolt
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post #2 of 10 (permalink) Old Mar 28th, 08, 11:30 AM
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Re: Can I use 882 and 993 heads on 307

Yes, they can be used. They had a whopping 8:1 static CR.

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post #3 of 10 (permalink) Old Mar 28th, 08, 11:43 AM
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Re: Can I use 882 and 993 heads on 307

On a flat top 307 with standard rebuilder gaskets, your looking at about 7.75-1 compression. BTDT. A better bet would be to yank some heads off of a 80's model carbed 305...it will have smaller chambers and won't have the bore to combustion chamber overhang like a 76cc 350 head will have. You might even be able to exchange your mismatched 76cc heads with a local rebuilder for a set of rebuilt 305 heads if you throw in a few bucks. I do that all the time as decent rebuildable 76cc 350 heads are getting harder to find.

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post #4 of 10 (permalink) Old Mar 28th, 08, 12:06 PM
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Wink Re: Can I use 882 and 993 heads on 307

I totally agree with Travis about getting a set of heads that will contribute to the efficency of the engine rather than use large-chambered 350 heads on it.
Not to mention the fact that the 882 head ranks right up there with the lousiest stuff GM ever let out of a foundry
They are light-weight castings, have the 'multi'-exhaust crossover (to help them crack earlier) and they have terrible shaped ports that screw-up flow big time ...
The 993's aren't as bad a choice - except for that valve shrouding and big-chamber thingy

If you can't find a shop to work out a trade as suggested, you can find good heads to fit your engine at many 'pick-n-pull' type wrecking yards for very little money.

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post #5 of 10 (permalink) Old Mar 28th, 08, 12:37 PM
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Re: Can I use 882 and 993 heads on 307

Quote:
Originally Posted by Vintage 68 View Post
I totally agree with Travis about getting a set of heads that will contribute to the efficency of the engine rather than use large-chambered 350 heads on it.
Not to mention the fact that the 882 head ranks right up there with the lousiest stuff GM ever let out of a foundry
They are light-weight castings, have the 'multi'-exhaust crossover (to help them crack earlier) and they have terrible shaped ports that screw-up flow big time ...
The 993's aren't as bad a choice - except for that valve shrouding and big-chamber thingy

If you can't find a shop to work out a trade as suggested, you can find good heads to fit your engine at many 'pick-n-pull' type wrecking yards for very little money.
Can you elaborate on this? what exactly is multi exhaust crossover and how are the ports different?
are these heads mentioned as bad as the 3917293 heads?

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post #6 of 10 (permalink) Old Mar 28th, 08, 01:36 PM Thread Starter
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Re: Can I use 882 and 993 heads on 307

i didn't even think about a trade with a local engine builder. Might give that a shot when I start the rebuild. No matter what I do, I can't sell these heads. Everyone is looking for 2.02 heads. If I had 2.02 heads, I wouldn't be selling them for such a low price.

1969 Camaro 350, Trickflow heads, ST-10 4spd, Hotchkis suspension, Baer SS brake kit, moser 12bolt
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post #7 of 10 (permalink) Old Mar 28th, 08, 02:13 PM
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Re: Can I use 882 and 993 heads on 307

The 882 casting uses a exhaust crossover conncted to 2 exhaust ports, instead of the usual 1 exhaust port. They are crack prone...more so than any of the earlier 76cc heads.
Too bad shipping would be so crazy shipping those heads...I need another 1.94 valved 993 head, and can always add to my stash of 882's.

The heads you have now have big chambers and the tiny 1.72/1.50 valves. Good for a low rpm truck application...and thats about it. They don't have hardened exhaust seats either for unleaded fuel.

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post #8 of 10 (permalink) Old Mar 28th, 08, 05:02 PM
 
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Re: Can I use 882 and 993 heads on 307

Pick up a pair of 305HO, -601's or -416's and cc them, then check your CR. and go!

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post #9 of 10 (permalink) Old Mar 30th, 08, 11:14 AM Thread Starter
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Re: Can I use 882 and 993 heads on 307

Travis, pm me if your interested in the heads. I can email you pictures as well. Curently they are in the cylinder head bag and boxes that my trickflow heads came in. I checked ups.com and it would cost around 85 to ship them to skiatook OK from sturbridge MA. I factored in the cost using ups ground and that the heads weight 100lbs together.

1969 Camaro 350, Trickflow heads, ST-10 4spd, Hotchkis suspension, Baer SS brake kit, moser 12bolt
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post #10 of 10 (permalink) Old Mar 30th, 08, 12:15 PM
 
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Re: Can I use 882 and 993 heads on 307

My -601's cost me $50 and like $50 to ship close by so go figure.

NOT knocking your numbers at all, just bitc-ing that S&H is becoming more than what things are worth, imo.

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