I'm glad you chose the bias ply's instead of the radials, I had both sets of the same sizes M/T ET street Radials 325x65x15 on ten inch rims and another set of MT bias ply the same size on 12 inch wide rims,. The radials on a good track were .18 quicker in the 1/8 mile and almost two MPH faster also. The bad thing about the radials was once they started to spin, I had to let off to get them to rehook, NOT GOOD. The bias would start to turn a tiny bit on a bad surface, street or track,, maybe 1/16 turn to maybe 1/4 turn before starting to hook and move the car forward and up

I drove that car on the street as well as at the local 1/8 mile track in Madras Oregon, it had coil over rear suspension with 34 inch ladder bars with four holes on the front frame mounts, it ran the best for me in the lowest hole, I had started it in the next to the top hole, kept the pinion angle and driveshaft 2 to 3 degrees different on every change to the rear suspension. It had single externally with a dial adjustable rear shocks on it to start with on the rear, I switch them to double adjustable later and got the best 60 Ft and best reaction times with them on the car after experimenting with both the extension and compression settings, the compression settings didn't seem to affect that car, 1971 Duster with a 512 C.I. stroker 400 motor in it with a 727 foot brake tranny, a really good 8 inch T/A race converter. Best time cork up in the 1/4 mile with the air cleaner on using Oregon 91 octane clear pump swill was 9.997 at 134.7 MPH, that was at Woodburn Drag Strip in July at the Mopar race with me driving it weighing right at 3450 Lbs. on their calibrated scales. That car was not legal to go that fast, it was legal to 10.00 at or under 135.00 MPH. I wasn't legal to go that fast either, no license or SFI-5 driving suit either, that change the next year with the 1970 Cuda that ended up running in the high 8s at 150.+ MPH

I was told I couldn't race that car their immediately after that run in the tower, the time slip person told me to go up in the tower before trying to make another run their that day, I convince them that I wouldn't allow it to run faster than 10.00 again, it had run two 10.00 flat at 134.?? MPH earlier that day during time trials, the afternoon tail wind had started to blow and that pushed it into the nines on that run

I loved that car, it went quicker and fatser everytime I touch it to make it go faster