High revving 340 stroker questions

72 duster, 2900 lbs, 28x10.5, 8 3/4 391 mvb 904. Has a 360 crate motor in it now. I know I’ll have to change rear gear and build trans

at that light weight running 9’s is a super easy piece of cake.
I would use ported Indy -2 oval port heads, and nice flat tappet cam, something in the mid 260’s, 640 ish lift. Good 950 carb, 8 inch convertor, indy intake.
You are there falling off a log. You only need 600 horse to meet your goal. You can look at either 3.79 stroke or 4.00 stroke.
We aware, if you spray, and making 600 plus horsepower, you are on borrowed time with both a production block and that 8.75 rear. I assume if you grudge the car you will be using a brake.
I like the Indy -2 better than the bigger -1 head. Either will easily reach your goals and provide room to exceed them
I ran well in the 9’s at 400 pounds more weight than you with W5 heads, which are no better than either of these heads, with no power adder.
Have fun,sounds like a realistic plan you have