tk's944

Is it possible to put a NA head on a S block with the S pistons. I know a NA has a 10.2 comp. ratio and a S has a 10.9 comp. ratio. Does any one know if this is posible cause a .7 increase in comp. would be about 10 hp right? Tell me what you think.

xsboost90

i would think the valve reliefs would be different, which is why the compression is higher- you can get the piston closer to the top w/ smaller valves- so w/ the bigger valves youd be hitting the piston.