Quite a stable.
I am putting a 512 in a 69 Dart, 727, with an 8.75 and RMS suspension F and R.
My choice is an Edelbrock RPM, keeping the compression down to 10.5. Planning to use Trick Flow 240 heads and a Comp Cams 23-602-9 or 23-701-9 stick.
Be fun on the street either way!