massive reconfiguration time again.

PRH said

I’m guessing the 596’s in question are nowhere near 270cfm.

And I wouldn’t recommend spending any money on them to try and get them close.

Most of the “home ported” variety of stock SB heads I’ve tested are usually in the 230 range.

A proper valve job and bowl blend on the SM heads would put them in the 260 range.

For a street/strip car with an 833, I’d expect to need more like 115+mph speed to be able to somewhat reliably get into the 11’s.
Unless you’re able to whittle the 60’ times down beyond what is typical for that type of combo.

Click to expand...

Your numbers on my 596 heads are much better than what I would have guessed.
I'm just right now taking a wild guess that somehow I didn't hit every button on the mark As far as tuning. I'm having a hard time believing that I set the timing just perfect and the jetting just perfect and went out and did the best the car could do. Also I got my two step working again and maybe I can get just a little at the beginning.
Now that the cages out and the cam is more mild and the gears are more comfortable along with the rest of the car I'm starting to use more fuel. Again I would like to not have to go get race gas to add and or have to carry some with me to pollute potential refills.
I've just tried to weigh all my options how to get 1/2 second comfortably and use pump gas and it seems aluminum heads fit the bill all the way around.