MP Super Commando Heads

Yes Johnny!!! Exactly the same head!
Let me give some words of wisdom to possibly save you some headaches.
1. make sure your heads are truly identical. valve sizes, runners, etc. Every mopar book lists a different size valves etc, even under this PN...so i hope they didn't make revisions as they went. mine matched, but i bought them at the same place.
2. new valve springs as suggested above. Springs were surprisingly cheap for these. they must cross to a GM lol.
3. if you're going on a 4.030 bore, prepare for LOTS of porting. These are really only made for an R block. They flow worst on a 4.030 bore in stock form than a stock edelbrock RPM head does. TONS of valve shrouding. you may be more of an expert on hand porting that i was, but i had to defer to the experts on the porting...they flowed awful as cast on a 4.030.
4.rockers do not exist for these on the open market to my knowledge. no off the shelf combo of T/A...or W2, or XYZ whatever rockers fit these. i had to have a set custom made by harland sharp. maybe TD or hughes makes them now...but you won't find them in a Jegs or summit catalog.
5. I made 610 on the engine dyno, if your goals are that ballpark...i would have looked into the new TFS, or even ported elelbrocks for alot less $ than i had in these. Hopefully you got them for a song.

I started typing this hours ago and got sidetracked. apologies if anything i'm saying above has already been covered.

LMK if i can help in any way.