Better Torque From A 318
its a decent head for a max 300 hp driver! by time you put big valves in them and port them magnums become a better bang for the buck till thay crack! after paying machine work, and porting,... speedmasters become the better fire cracker! last thing any body wants is added machine work now days when the same money puts you in new aluminum territory! like i said,.got a set of 302s with 86,000 easy granny moses miles on them for sale cheap!