any difference in 4.8l heads and 5.3L heads?
#4
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Originally Posted by camman
the compression ratio would be different because of the difference in bore size 4.8 should raise compression slightly on a 5.3
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Originally Posted by Dark Halo
the only difference in the 2 motors is the rod length and the crank stroke.
as for the heads, the numbers on my '02 4.8 yesterday were 862, and they were stamped 4.8. however the numbers on my buddy's '01 4.8 we pulled 2 weeks ago were 706. did the numbers change for the model year or something?
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