Dust off your crystal ball and GUESS the horsepower !

RustyRatRod said
Correct. That's how I was talking about. If you could find one still in good shape and was a good runner, you could put a good intake and carburetor and headers with a good hot distributor with a loose curve and there's your 300HP. Problem is now, they are getting older and harder to find lower mileage examples.

The 5.2 and 5.9s are still commonly found in junkyards out here. Durangos, trucks and vans are still coming in with them.
The roller cam would alleviate the likelihood of those cam and lifter failures.
I'd have to get one of those Crosswinds 4 barrel intakes. I'd need to do something about the fuel pump eccentric too. The Magnums sure seemed better at stopping oil leaks!

340six said
267.8 hp

Yeah, I did mention using the crystal ball. I just didn't know what range is to be expected.