Tell me about your 383 Stroker engines

[djmachinist]

I'm in the process of having a small block 383 Stroker engine built. I'm starting with my ZZ4 350 block and adding an Eagle balanced 383 rotating assembly kit consisting of a forged steel crank, SIR rods and forged pistons.

I'm adding a Edelbrock Top End power package consisting of the Etec 170 alum heads, performer rpm air gap intake, and edelbrock 2204 full roller cam.
234/238 duration @ 0.050, lift @ 0.538/0.548. Lunati 1.5 alum. roller rocker arms. I'm topping it off with a Quickfuel SS 680 cfm carb with elect. choke and vacuum secondaries.

CR=10.25:1

HEI Dist. and Sanderson Block hugger headers exhaust running through Magnaflow mufflers.

My engine builder is telling me this combination should put out around 450 to 460 hp/ 430 ft/lb of torque.

I already have a Pheonix built 700R4 OD tranny w/ 373 positrac rear end.
2200 stall converter.

What do you think? Is my engine builder being overly optimistic?

Thanks,
Dale