Hi all, new to forum so i don't know if this question has been asked already. i have an 82 f-150 4X4 w/ a 300 6 cyl. has anyone installed hedman hedders (summit part # 89300) in a 4X4. summit says they are only for 2wd. hedman says the same but was told they will work on 4wd. anyone have 1st hand experience that they will work on 4wd?