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Old 09-05-2013, 08:42 PM   #1
anubisani
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Join Date: Apr 2013
Location: homestead florida
Posts: 312
Compression and tbi

HEY GUYS if I hv a 1988 gmc R3500 with TBI 454 . The ??? is if I keep all things the same but change the heads to these :
3993820....71-84...oval...OPEN...454 Passenger and Trucks, 113cc chamber, 255/114 ports
will the TBI still work with the bump in compression , or will I have to upgrade the chip, fuel pumps , and regulator.
THANKS IN ADVANCE GUYS.
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