I'm not sure exactly what variables Desktop Dyno needs, but here is everything I could concieve being needed.

3.562" stroke x 4.030" bore(363cid)

5.700" rod

1.519" piston compression height

Total Seal gapless ring set

10.5:1 compression

Vortec L31 heads

Comp Cams Magnum 294S camshaft

Comp Cams Magnum 1.6:1 rocker arms

Edelbrock RPM Air-Gap intake

Holley 750 CFM 4150 carburetor

1.625" Hooker Super Competition headers

Moroso 8.25" deep 7 quart oil pan with built in scaper and windage tray


I'm probably going to do a gasket match to the intake and heads while also dropping in 2.02/1.60 valves in. The press-in studs will be converted to screw-in types and it will have dual valve springs in the 1.46" range. I hope all of that helps, if there is anything else you need, tell me. I really need to get Desktop Dyno...

 

I come up with 465 HP at 6000 RPMs, and 470 TQ at 4500 RPMs.

 

Not bad.

 

I ran your design through Engine Analyzer allowing
a conservetive head spec of 232 cfm@.500" in and 180cfm@.450"ex for your warmed over vortecs. with 2.02'sx 1.60's. You can exeed this easily, but will give you an idea.
I got 482hp@ 6500 rpm and 451 ft/lbs@4500.

I ran it with stock out of the box vortecs and got

460hp.
This would be under ideal conditions with no accessories on the motor to rob power. Your mileage will vary.

The real power of these dyno simulation programs is not the absolute numbers but the trends that occur when you compare
different parts. Take it with a grain of salt.

 

Yeah, Desktop Dyno has been known to be a little generous.

The only accessories I'm going to run are a water pump and an alternator, no power steering or air conditioning. I'm not sure how much power that would drain, but 20 sounds about right.