when did chevy start using vortec heads on the 5.7 and the 4.3? also is the heads an valves different on a 1995 5.7 and a gmc 5.0 of the same year?
when did chevy start using vortec heads on the 5.7 and the 4.3? also is the heads an valves different on a 1995 5.7 and a gmc 5.0 of the same year?
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