Promax or Stealth heads???

I am looking to upgrade the heads on my stock 383. It currently has 516 casting heads on it now. I don't know the compression ratio, it is a stock 67' 383 truck motor, no wild cam or high performance build by any means. I am running an 850 thermoquad with cast iron intake and shorty headders. Looking for advice on which head I should get. I am hoping to build a 400 based 470" stroker in the future when the budget will allow it. Would either of these heads work on the stroker? Is there a different head I should get instead?

440 source stealth
Intake port 212cc
Exh port 72cc
290cfm
80cc closed chamber
2.14" & 1.81" valves


Promax 9440 performance series
Intake port 210cc
Exh port ???
295cfm
84cc
2.14" & 1.81" valves