360 magnum horsepower guess

Brooks James said
Guesstimates on 360 magnum
Stock heads/block/pistons/rods/crank
650 double pumper
Knock off air gap intake
340 exhaust manifolds
Mp distributor
Msd ignition
Cam 498/512 lift 274/286 duration
Appropriate valve springs from Hughes

Hoping for 330-340 horses

here’s the 380 hp crate engine makes 409 hp, guess knock of 20 or so hp since you got manifolds.