You and you'r B-1 , need to stop reading 5.0 ,Muscle Mag ,and fast Ford ,cause there are a serious problem out there with U/Drive /Pulleys
in the REAL WORLD . I put U/P on my 1983 T-Top Mustang GT in 1988
thats wheb they first came out . Then again on my 1985 notch (bran new) then on my 1987 GT , Then on my 1991 Notch
Never did I really no the deffenece . ( Only cause the O'Connor ,cars rab so strong ) anyway