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Old 11-16-2003, 06:14 PM
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GM 305 Heads

Hi. I am new to this forum. My name is Chris. I need some help/info on GM 305 heads if possible. I robbed heads & intake from a '87 Iroc carburated car. Put on a 350 60 over block. Can anyone tell me the CC of the heads? I have searched for this info w/ no luck. They are center bolt valve covered heads, use a Q-jet carb (gutless). Any info would be appreciated.
Thanks,
Chris

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Old 11-16-2003, 06:34 PM
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We really need the part number off the heads. Should be a 6 or 7 digit number, usually inbetween the rockers, cast in the heads.

Mark
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Old 11-16-2003, 07:27 PM
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I thought all Small block Center bolt heads had FI intakes on them.They didn't ever put carb intakes on them from the factory did they?
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Old 11-17-2003, 06:09 AM
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Quote:
Originally posted by V8 S-10
I thought all Small block Center bolt heads had FI intakes on them.They didn't ever put carb intakes on them from the factory did they?

it will work with some machining in the old style manifold
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Old 11-19-2003, 05:41 PM
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in 87 they did both i know for sure they did a carb intake because im using one

Quote:
Originally posted by V8 S-10
I thought all Small block Center bolt heads had FI intakes on them.They didn't ever put carb intakes on them from the factory did they?
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Old 11-19-2003, 05:58 PM
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Ive seen a cast iron high riser intake made for carburator that fit 87-95 cylinder heads.
I used to have one on my truck they weigh a ton though.
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Old 11-19-2003, 06:10 PM
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305 heads

i dont know if i am doing this right but from what the man told that put the motor together compresion was not a problem because thay were not h/o heads from what i gather thay made two 305's that year standerd and they h/o......casting # not a 5min job this truck has cruse and air on it tite fit thanks chris by the way did i mention this s/b has no balls?????
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Old 11-19-2003, 10:22 PM
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Most late model 305 heads I've delt with had either 53 or 56 CC chambers. With flat tops you are near 10:1
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Old 11-26-2003, 05:56 PM
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cam-curve help

have 60 350 factory 305 heads intake and q-jet comp-cam int 218 exh 224 480 lift would this need to be set up with a curve motor man says to small dont worry timing is iffy vacuum advance on or o off nothing seems to wotk up to par 34 degrees at its peak works but it give up about 3800 make power but only about 30% after the 3800
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