RGL408, my Duster has a similar combo. Cam is Mopar Purple 528 with OOB Eddies, Edelbrock STR 12 cross ram with 450dp hooleys, compression is unknown as I didn't build the engine, torque converter is 10" 3500, running 3.91 8 3/4 with 28" tyres.
Made 320rwhp at 5400 on the same Dyno, revlimet...