polywideblock
Member
when I got my 71 340 4 speed roadrunner it came with a 3:23 8 1/4 sure grip diff , the seller assured me all the drivetrain was original to the car.
I have yet to see another 71 roadrunner with the 8 1/4 diff although I heard a few times that there was a shortage of 8 3/4 diffs at one point and small block cars got the 8 1/4 diff while big blocks got the 9 1/4 . anyone know anything of this ? any info would be appreciated
I have yet to see another 71 roadrunner with the 8 1/4 diff although I heard a few times that there was a shortage of 8 3/4 diffs at one point and small block cars got the 8 1/4 diff while big blocks got the 9 1/4 . anyone know anything of this ? any info would be appreciated