whats the highest offset i can go with my '81?

 

Well that really depends on the width of wheel you plan on running. To give you an idea im running 17x8 +34 (if I remember right) on the back of my 76

 

how is the inner and outer fender clearance for your 17x8? are u streching a tire at all?

i found somewhere that the bolt pattern is 5x114.3 which got me kinda excited it that true?

 

Yep 5x114.3 or 5x4.5"
Ford Mazda etc etc

Mustang rims fit nice

 

not sure on your body but next gens need about a 38 min with a 8 or 8.5 wide rim to tuck.... if your running 18 or so smaller you can do a 7.5 wide and i would think 38 or more would clear no problem.. its kinda aggravating but you can measure yourself and see what will fit because just cause it will tuck you still may have several things that have to be reloacated if you plan on getting it low

 

i just got some 16x8s at a "0" offset..think they'll fit?

 

just got some? put them on and find out

 

If you're lowered then they might rub.

 

i'm tucking half of my sidewall, so idk what to say

 

My 17x8's don't rub at all, running no stretch and they barely clear the lip of the bed so they fill it out really nice. And when she gets lower I don't think ill have any problem tucking.

 

15x10 -46 225/50/15