ICON 9976 with Magnum Heads?

BsB Duster said
The car is going to be a cruiser that will occasionally see the local 1/8th mile track. It has a 67 model a904 and that’s the main reason for the smallish camshaft because it has 19 splines and I can’t get a stall convertor for it. The rear in the car is an 8 3/4 with 4:30 gears on a 28 .....
I figured the magnum heads would fit the bill. I’m hoping this setup will get me in the 350ish HP will close to 400lbs of torque. I might be way off here.

I think your on target close enough.
I also have the old 904 / 19 splined converter. I had it re stalled @ Pro Torque, good for 650HP and laughing gas.

BsB Duster said
We have 93 pump here. Tire size is 28 drag radial a904 and 4:30 8 3/4. I actually was trying to buy your j heads but was slower to respond and missed out.

There not paid for yet. (Should be soon though....)
But I have bare builder 308 or 596 heads, I forget. In fact, I’ll have to dig them out later.

The Magnum heads are a good choice. A bit more involved that a straight LA head swap.