Suggestions on performance upgrades for 225

Thank you everyone for the great responses. So if I'm getting this right, a 2bbl carb versus a 4bbl is recommended, with dual exhaust?

I'm hesitant to do any cam work until I can find a mechanic that can accommodate the work.

Any recommendations on a manufacturer for both intake and exhaust manifolds? And who makes the best 2bbl carbs for molar?

with the van you have tons of room and plenty of ground clearance for headers if you want. Dutra-duals are a decent choice and a member(waggin) on here makes another type of dual setup. less than Dutra-duals.
I know that a couple of members on here have a set (me included but mine are not on the motor yet) I think "memike" has a set on his car and it's been a while so you could pm him and ask him how he likes em.

x2 on a good (2bbl carb)one from slansixdan. for the super six setup