Soak all with PB Blaster or Kroil then smack them...
If still doesn't come apart, heat them with rosebud
on yer torch and smack 'em again...

As a last resort I've cut the shackles (got new ones) and used a rosebud and press to get the bolts out of the springs..

Good luck........

Geoff

49 Chev 4400
52 GMC 350
55 Chev 3800 1st series
37 RD4 Cat
50 JD420C w/JD90 Loader


Geoff


68 GMC 3800
56 JD420C w/JD90 Loader