Used Diamond W2 Aluminum Heads Yay or Nay?

I take it you know you will need the special W2 intake rockers
but you will also need to get B3 or other help on the geometry
If you have not done so go to the B3 website and read the three tech articles
I recommend the cups be in the adjusters not on the ends of the pushrods and recommend oil through the pushrods for best adjuster ball life
no comment on rocker choice but ask B3 and rocker arm specialists in Redding Cal for suggestions and the more ratio the better on the intake
Clearance your block for the largest dia pushrods that will fit
one way to help the block live with all that power is to keep the piston/ rod weight light