ok so i know 81 was the year that they changed the bolt pattern on the spindle for the disk brakes. i don't know if mine is the earlier pattern or the later one. if it is the earlier one what do i have to do to get the later pattern? just replace the spindle or the whole knuckle?

 

nobody ever had this problem?

 

Its to do with the wheel hub assembly, not the knuckle or spindle. On the earlier ones the rotor is held on by just the lug studs been pressed through. Ones needed for the upgraded brakes also held on by 2 bolts.

If you have 2 small indents inbetween your 6 wheel studs, you have the correct wheel hubs... kinda hard to explain i guess.

 

ok that makes sense. so if i don't have that what do i need to change it, or do i need to change it at all?

 

Why would you need to change it?
If you're going for new disks.. just ask for ones for an 81.

 

i want to upgrade the bigger vented rotors and they're only avaliable for the later bolt pattern.