Not a Mopar but ...AMC 360 on the Dyno

This guy is now retired I believe, but he has shown a few really cool builds. If interested, just look up some of his threads on IFSJA.

https://forums.ifsja.org/forum/tire-kickin/street-performance/2472880-amc360-stroker-397-cubes

When I took my 401 to be dynoed, we had to track down another header for one side, because the header I had wanted to be where one of the engine support legs was. The owner called around and found one on a Friday evening. If he had not, I would have been bummed after driving six hours to his shop. My effort appears to fall very short of yours, but that was the first engine I ever built. I would love to find someone fairly close that really knows AMC's to go through it and find some more in it.