4/7 swap in firing order..

You are probably having a hard time because they don't have the UGL cam blank to do it. Can you still buy these from Mopar Performance?
MoPar has this:
P4876633 Race UGL Camshaft — Roller Tappets, for Babbitt Bearings P4876372 (“R” Blocks)

no normal flat tappet ones tho.

Lunati = Big Block only
havn't heard back from ISKY or BULLIT yet.
Comp & Crane was a flat out NO.