Fastest Duster on stockish suspension?

Great replies Guys!

I ran a 68 Dart into the tens with an all iron 452 but.
It was an ex 8.50 car with a pro back half and huge slicks.

So I want to go back and start from scratch with a Plymouth Duster.
Got a nice bare shell and want to run in UK super stock.
Rules are fairly loose, but leafs are priority.

I never run a small block in anger but maybe I should consider this route?
Cost and knowledge wise, it’s easier for me to run a Big block.
Not a 440 block, but a 451 lowdeck 400 all old school like lol.

Always been a big fan of Koffel’s iron headed 451’s.