305 compression ratio
 

Can anyone tell me the compression ratio of a 84 305 chevy with stock full dish pistons and 58cc heads?--thanks

8.5:1 with the factory .028 thickness head gasket. with a aftermarket fel pro .041 gasket about 8.3:1

thanks double v

305 heads
 

some one asked about 305 58 cc heads on stock engine with dished pistons,will this be the same for dished pistons without valve reliefs, Trying to run on low octane gas. I have a stock 305 bore and 58 cc also. thank's