Its more they offer the same port design and valve sizes but in a smaller port size.. 253-256cc vs the what 280cc on the L92's? Like I said just poking around lol
Aside from the L92's I'm looking towards the PRC LS6 Stage 2.5 heads.
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5.3L LSx, Fbody .500 cam, TH400, 4500 Stall, Moser 9"
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