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Old 01-26-2013, 09:36 AM
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building 400 sbc

I have a stock 76 400 sbc in good running condition,i want to pu it in my 69 Acadian,it has a t350 trans with 308 gears, i want to put 3973370 64cc heads on it with a adelbrock intake & 650 edelbrock carb,these heads are the same as 186 heads.i won,t rev the motor over 4500, it,s a driver not a race car,the heads are stock with 194 150 valves. what compression will the motor be,it had 76cc heads.what is a good cam for this motor,im looking for decent milage for a driver. the original 307 2bbl gets about 17 mpg hwy. if i could get the same with more power that would be a bonus,it has duel exhaust also.all info appreciated,Im not touching the short block other than new oil pump ,double roller chain & gear & lifters. cam?

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Old 01-26-2013, 11:32 AM
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Without knowing the dish size of the piston and the piston deck clearance (how far the piston is down the hole at TDC), there's no way to say w/any real amount of accuracy.

That said, if the dish is 24cc and the quench is 0.040", the CR will be about 9.5:1 w/stock bore and stroke and a 64cc chamber volume.
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Old 01-26-2013, 12:29 PM
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400 sbc

orig it is 8.5 to 1 in 1976 with 76cc 882 heads.
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Old 01-26-2013, 12:30 PM
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400

The original pistons have a 22cc dish
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Old 01-26-2013, 04:05 PM
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Quote:
Originally Posted by red40chev View Post
The original pistons have a 22cc dish
just right on a 400 with a 64cc cylinder head. Will need 92 octane gas.

If you want a low rpm cruiser with 3.08 gears do not get crazy on the camshaft.

Nice set of heads. Get even nice with some hand porting.

Camshaft Isky "262 Supercam" #201262. Degree it in.. Can use 1.6 rockers.

Last edited by F-BIRD'88; 01-26-2013 at 04:10 PM.
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Old 01-26-2013, 08:56 PM
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The 400 economy engine I built years ago had stock short block with sig erson tq-20 cam,holley street master intake,625 carter,1 5/8 headers,2.73 gears,,,20 mpg and low 14s in an 86 monte carlo
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