Quote:
Originally Posted by muncher
Hi my truck is a 1987. I have been told it has vortec heads on by the way the rocker covers bolt down. (centre bolts along top of cover). Not sure how accurate that is.
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1987 was the first year for TBI and they also have center bolt heads. Chances are you have a TBI 305, not a vortec 305. The TBI has 8 bolts on the intake and vortec has 4. The TBI engines should have a regular flat tappet camshaft but your block could be set up for a oem hydraulic roller.