We run 414ci 4.060x4" ,1973 59 drgree with steel center caps with studs,12/1 flat tops with W5s 325I@.650 /235E light steel crank with bme 6.123 rod , 58 quench ,1 3/4 schoenfield fenderwells with 3.5 collectors current cam is comp solid roller 260@.050/262 , .630/.631@ 106 on 106 with 1.5s with a BG 850 M1 intake with 1" hollow spacer & 1/2 No2 plate, 727 w/5k conv old cam & carb were cam motion 280/284 -.660/.659 @ .050 107 @103 holley 1050 w/2" adapter the truck is toyota weighs 3500 w/me . with the big cam & light tires we pulled to 7800 with heavy tires 6500 w/small cam pull to 7200 light tires /6500 heavy/tires light 38.5x11.5/ heavy 38.5x 15 / 39.5x16/ we run light 40x17 cut tires but are working on a spring bind problem thats real bad with the cuts , the big cam runs better ets with the light tires / the small cam runs better ets with heavys than the big cam , I know there is a better choise in cams just havent got it right yet