My old pump gas 1971 Duster weighed 3450 lbs. with me in it(260 lbs.+), radio, heater, full interior with a chrome moly 6 point roll bar and no back seat, fiberglass front bumper and lift off race weight hood.
Hedman 2.0 x 3.5 fender well headers and a full three inch exhaust to the rear bumper.
The motor was a 400 block 4.375 bore with a 4.300 stroke crankshaft for 517 C.I., 10.78 to 1 compression ratio, Indy SR heads with M.W. size intake ports with 2.19 intake valves and 1.81 exhaust valves, Indy 400-3 intake and a Holley 1050 CFM #9375 Dominator stock carb. Harland Sharp 1.6 ratio rocker arm kit, Comp Cams custom solid roller cam that was 260 degrees @ .050 intake with .420 lobe lift, 266 @ .050 on the exhaust with .409 lobe lift ground on a 108 LSA installed at 106 intake lobe center. That motor made 727 corrected HP at 7000 RPM in Klamath Falls, OR which is at 4300 FT. I swapped the heads and rockers to a set of CNC ported Indy 440-1 with the exact same compression ratio, same cam and intake and carb. and that combination made 775 HP at 7000 RPM also on Oregon pump swill also
Ladder bar rear suspension with Strange Engr. double adjustable coil overs and a diagonal link Dana 60 truck housing cut down with Strange Engr. 35 spline axles and spool, stock Dana 4.10 truck gears, 10 inch wide rear wheels and 315x60x15 M/T ET Street Radials, 10.00 ET at 134. + MPH corked up a bunch of times on Oregon 91 octane non ethanol pump swill with the air cleaner on
I had a set of CNC ported Eddy RPM heads and a low deck Eddy six pack intake and a set of stock type Holley 440 6 pack carbs. on the car before swapping to the indy heads and intake. The six pack combination ran low 10.30s at 127.+ MPH corked up a bunch of times also
IHTHs