You’re recipe isn’t that far off, but I would change a couple of things. That carb would be too big. A 600 or 650 would be right. These engines don’t turn enough RPM to need such a carb. My second suggestion is most important. Don’t bother milling the heads. That would only give you a couple of tenths improvement at best. Your best bet would be to bore it and use the TMI pistons spoken about so much on this forum. If you really want it to run you MUST get the CR up and you can’t accomplish that without pistons or aftermarket heads. Pistons are the most economical route.

This a mid range engine and if built right will work wonderfully in the midrange so DON’T over cam it. Don’t undercam it either. 220@.050 or 230@.050. With stock heads I would stay with 220, and with aftermarket heads and a high stall converter maybe the 230 would be okay.

Also, think long and hard before the 35 inch tires. If you insist on them, don’t do it unless you do some SERIOUS brake improvement. I had 33’s on mine and even with power brakes in good condition I had to TROMP the brakes. The added rotating mass takes a LOT to stop. Having experienced 33’s I can’t begin to imagine how poor the braking would be with 35’s. BTW the gears are probably 3.50’s. 3.56 is not a ratio typically found in a nine inch.

My $0.02,

What is your budget?

The TMI pistons with properly prepared stock heads is a much better value than the expen$ive heads anyway.

I wouldn’t even be able to guess at a horsepower figure, but if it’s a big horsepower number you’re looking for, you’re working with the wrong engine. A 4” stroke engine is well suited for building low rpm torque. Horsepower is a calculated figure. In the calculation a torque peak at a higher rpm gives you a higher horsepower figure. Horsepower is basically indicating how much energy is made overtime. Very generally speaking, torque makes a car fun to drive while horsepower wins races. In a truck, torque doesn’t so much make it more fun to drive, but makes it more suitable for hauling or towing.

And.... yes those are the pistonsoften discussedand recommended here.

Before you go and get your heads reconditioned, milled and reworked you may want to get some estimates and then see how much aluminum heads cost.

aluminum heads will also get you some quench if you get the right pistons. No quench with stock heads.

it takes a LOT of $ to get stock heads to flow anywhere near new aluminum ones and the aluminum heads will allow you to run higher compression with pump gas.

Another option might be to go with 4v Cleveland heads.