284/484 mopar cam for 340
I ran that same combo in my 69 swinger 340 4 speed, 3.91 rear back in the early 90"s, factory replacement trw pistons, stock rockers, headers, torker 2 intake, it loped pretty good. Pulled hard to 6k but didn't really start screaming til about 3k. Showed a lot of 5.0 Mustangs and Camero's my tail lights.