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

The MP crate engine, 360/380 hp is basically a stone stock long block with a Hyd roller cam of 230@050 on the intake and .513 lift. These engines dyno’d constantly over 400hp.

Your cam choice will make more torque down low and give up some power up top. If your going to stay with your cam choice, your going to need to do one or the other of, porting the OEM heads or moving to aluminum heads. The Edelbrock Magnums are the choice here. The better higher flowing cylinder heads will allow more HP and extend the RPM range a tad bit.

Use the 5.9 over the 5.2. It’ll have more torque and make more HP.

Another note, the crate engine used a M1 single plane. The Edelbrock RPM is capable of meeting the HP goal with more torque. A spacer under neath the 750 carb would be great if it fits under the hood. MoPar also used 1-3/4 headers.