i'm running a stock bottom end 5.0 with e cam and novi blower.I can get a set of 1970 351 heads with 1.90 int 1.60 ex valves and a mild port and polish job do you see any gain over my stock e7 heads thanks

 

Yes they should flow better than the stock E7's, but the combustion chamber may be smaller which will raise your compression ratio....not something your gonna want with boost. I would find out the combustion chamber size and go from there.

 

thanks those are out!!!!! looking for a set of aftermarkets or some gt 40's