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I don't think it matters what size cube motor it is but reborns rite V-8 usually run 17-22 at sea level if all is well, valves, timeing, vacume lines, etc. Lon
 

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Vac!!!!

If you get that many HG that motor will have to be brand new!!!! and maybe just maybe you might get sixteen. Remember you got built in vaccuummmmmm leaks even in that year.:)
Guess whooooooo
 
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