Ray what you building?
Some if not all of these SB mopars are just nuts.

Mine was a 340 from 1970 dont know what car. In
1987 this was going in my 67 Cuda street/strip.
Everything was all stock, but the 340 X heads
were ported. The tunnel ram had two Holley 450
cfm mech carbs. With a Lunati hyd cam it would only
turn about 6300 rpm. The Cuda ran 12.20's
in street trim.

22 years ago this was all I could aford and back
then I only remember W-2's for aftermarket heads.
And strokers, that was high dollar pro stuff.