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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.
 

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What kind of compression are you running now? By installing the 351W heads you will significantly drop your compression ratio. I have a 302 that has 12.5:1 compression pistons (302 with stock 53cc head) that I installed the 351 heads on and it lowered the compression to about 10.5:1.
 
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