ok as you all know from my previous post i just embarked on my first Ford [a '65 Galaxie]. when i was building my Chevy's i was told by a respectable machinest that if i planned to run the motor on pump gas i needed hardened valve seats put in or damage to the valves could result. is this true? i know you can add a lead addative to the fuel but that would be a expensive for a car i plan to use as a daily driver also i i was to get heads off of a later model FE [not sure what year gas changed] that ran off of unleaded fuel would that solve my problem or would those heads not fit my 352? i think it may just be cheaper to have hardened valve seats put in the heads i already have what do yall think?