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Bought a rolling chassis the guy told me it had 456 in the 9'' rear. Got motor in it and went to track it was crossing @ 6000. So i brought it home and pulled chunck it has 411. So im thinking about putting 486 in it because my camaro has 488 and it crossed at 7300 which was perfect.This is a vega that is around 2300 how much rpm difference should i see going from 411 to 486? My camaro weighed 2750 and crossed at 7300 with same motor and tranny
 
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