Long time lurker, first time to post. I have a '74 Swinger, gen 3 426c.i.(hughes engines dyno test 21) 1000 cfm demon carb(81 primaries-91secondaries), timing at 20 degrees from 4000rpm on, 727 with cheetah trans brake and ati convertor built to match, Dana 60 4.10 gear spool. Ladder/leaf rear with anti-roll bar, Comp. Engineering shocks all four corners, rears set at 50/50 fronts 90/10, 30x9.50 hoosier radiual slicks. it sixty foots 1.38-1.40 pretty cosistently. Car with driver is 3250 lbs. I shift at 7000, and it traps about there, too. Best e.t. to date is 10.23 and best mph is 130. Density altitude is usually hovers around 3500 to 4000 in the heat of summer. Seeing some other builds on here and on moparts, it seems I'm a little off the pace. any suggestions appreciated. Thanks for reading through my rubble, Lol.