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What are the differences in an 03-08 5.7 hemi valves and where the rockers sit to the 09 and up?
Do the 09 and up 5.7 use a longer valves and is where the rocker shaft sits raised up?

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The 5.7 G3 Hemi heads use the same valves. 2.00"int/1.55" exh. The 5.7 G4 Hemi heads use a 2.05"int/1.55"exh and the valves are taller thus moving the rockershafts higher and wider than the G3's.

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Thank you sir.