I'm running an 800 Thunder. 500 + lift cam advertised duration is 285 or there abouts. Yes big lumpy cam. Don't have exact spec's as i didn't put it in. I'm changing to Lunarti Voodoo 603 cam. Back to the carb. I bought this car with an 780 DP, torker intake, unilite dist. Ran good but no power house. As i'm not a fan of Holley carbs that went first. Had a stumble at tip in. Changed the springs and fattened up with rod change. Better but still a little weak down low. Removed the torker went to a Performer intake. Big difference. Went with an MP electronic. Still had a small stumble. Went to 43 squirters. Much better but still there. Got to the timing. started at 15 initial. Ended up with 22 initial. Recurved the dist for total of 38 all in by 2500. Stumble is gone Car is now a great tire frier. Still over camed for a street car but 100 times more fun to drive then when i bought it.