hi, i have a 94 gt with 100,000 miles.engine is stock. will 1970 351w heads work . do i need the smog passageways like e7s have? or can i bypass smog system? if so whats the best way? i only ask because i have a set of new power heads left over from another projet,1.94 1.60 valves,60cc, 550 lift springs, cnc ported,and 1.6 roller rockers.and head bolt kit.