I agree with Duece -another $750 - OUCH! I've been reading and asking around about the 4.8 vs the 5.3. It's about 20 more hp and 20 more ft lbs torque. Also, it seems the 5.3 is more amenable to bolt on hp mods. With either motor I'll have plenty of power (I say that now, but I'm sure I'll want more once I drive it awhile). What do you guys think of the 4.8 vs. 5.3? I doubt I'll have the budget for an extra $750 for the 5.3 but anything is possible.

I realize I'll need a new radiator, new exhaust (LS motor comes with stock exhaust manifolds, but I need new exhaust pipes), gas pedal cable routing, clutch and flywheel. They say my existing bell housing will work.

Pacific Fab quoted me $650 for a clutch and flyweel -does this sound right?