Stock heads/rotating assembly, hot cam/vlave springs- how far can you go?

@MRGTX

rumblefish360, you've come through with great answers to my questions many times. It's always extremely appreciated. Thank you.
Very good points about the limitations of the heads and the sacrifices in the low end in favor of higher rpm performance...that is all understood. A net improvement in power with a bit more joy up high in the band would probably be enough to keep me happy for a while.

I realize that the current setup reads as if it might be "ok" for a street/strip setup but there's just something off about the combo and it seldom feels good. I believe the 3spd transmission and the short gears are amplifying the "short legged" feel of this motor.

So...It sounds like I might do well with something similar to the Magnum 380 cam, the Hughes retainer and spring package and the Edelbrock RPM Airgap intake? It also sounds like you're not optimistic...

Click to expand...

Your welcome, glad to help.
Im not really optimistic because this route often ends in people being unhappy about the in between mods.
I am in the middle of doing just what I suggested without any plan to upgrade the engine later. IF and when I decide to do another engine for the car, it will be a stroked big block & a 6 pack.

Anyways, back to you.... yes, I’d use the Edelbrock RPM intake because it is a much better part for the task at hand. The MP dual plane is a copy of there earlier OE 4bbl manifold. It is fine for small cams and drivers.

The MP single plane M1 is race intake. IF I was using one, I would be ignoring all power below 4500 rpm, and I would be targeting a very low car weight and E.T.’s in the 10’s for starters. No higher than 11’s.

The Edelbrock RPM fills the gap in between with excellence and can run in the low 11’s. That’s the intake to use. Sell the MP dual plane and roll the money over into the RPM.