i hava 90 blazer i had a tbi 4.3 but it was bad so i scrapped it and bout a 4.3 vortec out of a 94. i wanted to swap over my tbi manifold to save money instead of redoing everything for tthe tpi manifold. after i got the new motor in i got ready to bolt the manifold down and did not noe tht there is a balancer shaft. my tbi manifold is bubbled at the bottom for the coolant passage and has a drain plugg. it is not clearing. is theree anyway to trim it down to clear. it was lifting up the whole intake. i took a dremelle to it and trimedd a lil bit and it wont lift it anymore should it be ok
?!?!
thanks

 

are you using the tbi from the 94 motor?