joshbrennan
+1y
the 6 on 135mm is wrong. the mazda bolt pattern is 6X139.7, you would need to do a re-drill.
a basic rule for mazdas is a +45 for an 8" wide wheel; +40 is only about 3/16" off, so the offset should be fine. This rule is for 86-93 mazdas, so im not sure about your 83, but i'm sure they are close.