440 tunnel ram

Hi all

I currently run a 440 on weiand tunnel ram with twin holley 600 vac secondarys. Ignition is controlled by msd 6al box and msd pro billet distributor with 3.75 final drive.

Engine is currently stock. Im looking at changing the heads, rockers cam and torque converter. What would people recommend.

I do also have a set of holley 660 centre squirters would these suit the set up better then vac secondarys