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tpulliam79 · 10-20-2008, 06:41 PM

if they didnt change the cam out of the 78's short block and put the 91's heads on for the tbi , would that affect anything? vacuum or otherwise? I also had the wrong prom in the new ecm so ill know shortly about the ecm

10-20-2008, 06:41 PM	#64
tpulliam79 Registered User Join Date: Sep 2008 Location: spokane valley, wa Age: 29 Posts: 283	Re: 1991 chevy 1500 5.7 tbi erratic idle if they didnt change the cam out of the 78's short block and put the 91's heads on for the tbi , would that affect anything? vacuum or otherwise? I also had the wrong prom in the new ecm so ill know shortly about the ecm __________________ 1991 chevy 1500 ext. cab 5.7 TBI 1988 chevy reg. cab 5.7 TBI lifted 8" swampers ( GONE Wife made me sell it ) Last edited by tpulliam79; 10-20-2008 at 07:00 PM.