Just a 284-484?
I had one in my 65 Barracuda: 68 340, 2.02's, Hooker fenderwell headers (small port even) Strip Dominator intake, 750 Holley, 284-484 cam, MP 175K convertor (2200?) 3.91 rear. Light 'em up! Same cam and a STR-12 intake with a single Demon 650 felt a little slower but still spun em through 2nd. I liked it, 700 rpm idle in gear, about 750 out. Very tire limited back then due to fender lip. I heard the .509 cam was the dog!