I realize this is an old thread, but I figured I would throw out the combo I've run in my '84 pickup.
1/2 ton longbed-4200 lbs with me in it
406 SBC-stock crank/5.7 rods/hyper flat-tops (roughly 10.5:1)
487X casting heads 2.02/1.60 valves ported (by me
)
Comp Cams XE262 4x4 cam
Edelbrock Performer RPM Intake w/750cfm Holley vacuum sec.
700r4 w/very tight towing converter
12-bolt w/3.73 gears
M/T Sportsman Pro's 26x10.5
Best pass: 13.97 @ 101 mph