5.2/5.9 H.P build guesstimate

Slantsix64 said
Sup guys, so this is my new build I have a cheaper way of going with a ready core 5.2 magnum in my yard, or just find me a 5.9

Car is a 67 Abody, manual steering brakes, 904 trans go shift kit 2800 stall converter 3.55 and 3.91 gears available. Long tube headers Rpm Air Gap and a 750 Holley Vacuum secondary

Camshaft I have a used Howard’s grind, .503/533 lift @50 221/225 intake 274 exhaust 278

Two questions, will this work well with my 5.2 block or should I source a 5.9?
Also how much H.P are we looking at, trying to get in the 375-400 Range lol

Richard gets 350 hp out of a stock 5.9l longblock with 4bbl headers and a 212 cam, I would say the 5.2l would get similar. The 380hp crate engine gets 400 hp with 230 cam so your cam is about in between so I'd say should maybe get the 375 hp.

The 5.2l is gonna need about 500-600 more rpm and higher stall and about a half a ratio deeper gear to perform similar as a 5.9l. So that's up to you if that's fine.

Here's a basically 400 hp 5.2l (318 with magnum heads)

https://www.motortrend.com/articles/mopp-0409-318-engine-build/

And here's a 400 hp 5.9l

https://www.motortrend.com/articles/mopp-0303-360-crate-engine-buildup/

And here's the 350 hp 5.9l