Build me a Small block

Do you have $6500? That's a budget 500hp 360. Also, that's a very light car. 100 less hp would move the car into the 12s easy and be about $1500 less.
I agree.
My 66 runs 12's at 5800 feet with a stock stroke 360 with OOTB eddy heads and a solid cam. 1-5/8 Dougs, 904 and 4.30 gears. Your 65 is light enough where 400 horse should move it real well.