ok i have a 86 i roc with a 305 tpi i also have a 350 out of a 95 1/2 ton chevy truck wanting some opions on what to do i want to keep the tpi setup but with the 350 having new style heads and the 305 having old style which the tpi is on will it fit the 350? or could i put the 305 heads on the 350 block what would be the best out come for a mild street car what kind of tuning and so on

 

This may surprise you, but those particular 305 heads will outperform those particular 350 heads. You'll need to run premiom unleaded if you do that swap, but that's your better option with what you have.