1993 350 what?
check auto.consumerguides.com
The combustion chamber size of a Chevy 350 stock head typically ranges from 64cc to 76cc, depending on the specific cylinder head casting.
Bore and stroke is 4 x 3.48 inches or 43.75 cubic inches per cylinder. the correct answer is 76 cc .
You will need to have the heads for the 305 bored out to the same size as the 350. I disagree: you can use the 305 heads on the 350 block but you will increase compression as the 305 heads have a smaller combustion chamber. The critical dimension is valve clearance. If compression ratio is a critical consideration, different pistons may be available which will bring the combustion chamber back to size. the 305 is from the 3.671 inch bore family. The 350 is from the 4.00 inch bore family. All small block heads have the same bolt pattern.
NO NO NO the combustion chamber is smaller and will have too much compression.
no, small bore ,big combustion chamber you want big bore small chambers
If it's stock then they are most likely 76 CC large chamber low compression heads. Only way to be absolutely sure is take them off and see, but if you're sure it's a 74 then chances are extremely high they're 76 CC's.
Yes they both have 4 inch bores but if the chamber size where the valves is different it will change the compression.
heads will bolt on but will not work. the combustion chamber is too small resultingin too much compression.most anything else (brackets,exhaust accessories etc.)will work
Rather than grinding in the combustion chamber, which would lower the compression ratio, I would think there would be more to gain by working in the valve pocket. Especially the short-side radius and the bottom of the valve guide. Also, a good three-angle valve job can improve flow through the head.
more than likely its a 5.7 l 350
if its a full size blazer 7000lbs
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