Fast boys. ???????

[Dirt Knife]

What starting pinion angle on a fast boys
Leaf mod ??? Also. Front springs for impala
Stub. ???

Thanks. For help.

[SCOOTER M40]

6 down ,never did put Impala stub on any Fast boys cars.I would put 550 l/f 650 r/f and start there

[Dirt Knife]

Thanks very much.

[Dirt Knife]

ok
the pinion angle worked
yet when I throw it in hard and stand on it the right side frame molds the door to it
and the track.
compression on right side shocks 4-4.5" with a 700# RF and 200# RR
30-50* shackle angle on LR also 3-1/8 stagger mid turn to exit push

the car wont spin out without someone's RF in my LR and has awesome forward bite.

thinking going with a 700 LF and 900 RF

ride height 4-3/4" LF 5-1/2 RF 5-3/4" RR 5.5" LR with a 150# bite in RR

does this sound right??