64-73 All v-8 stangs had 5 lug. Inline 6 cars had 4 lug. All mustang II's had 4 lug as was mentioned b4. 79-93 fox bodies all had 4 lug whether it was 4, 6, or 8 cyl....except for the SVO mustangs. The svo's all had 5 lug even though they were 4 cyl. All 94-current stangs are 5 lug.