building a 5.0 305
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Originally Posted by J$Money
how can i tell if the motor was previoulsy TBI or TPI?
If it includes the heads, the desired head casting number will end in 416 for an '82-'84 H.O., and also for '85-'86 TPI. '87+ TPI 305's will be 087 and are the same head as the 416, just with a revised intake bolt pattern/angle. Don't go after any other 305 heads as they are all junk. If you happen to find a set of the 113 casting aluminum 'vette heads, they also have a 58 cc chamber and carry larger 1.94/1.50 valves and flow very well for a stock set of heads.
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