One more comment: I was hell bent on replacing my stock water pump pulley with a 25% underdrive one I got as part of a kit from Summit racing (kit was on clearance for $35 and I sold off the other two pulleys for that price). IIRC, the circumference of the new pulley was 1-1.5" longer than the stock one.
I was hell bent on getting this to work on my tbird so this necessitated me replacing my stock 93 tbird waterpump with one from a 94-95 mustang 5.0 (different snout lengths, bolt positions, and size of the pulley mating surface).
Luckily enough, the 84.5" belt still worked quite effectively despite the larger diameter WP pulley. As a bonus, I never liked how the close the 84.5" belt was to the maximum tension position of my tensioner. It now sits more in the middle range of the tensioner sweep.
Was wondering how this belt setup has been working out because I want to delete all my smog and air. Also will my heater, defrost still work without all the air components ?
92 Thunderbird Sport 04 Mach1 05 Mustang 77 F-250 460 Tow Pu 69 Mustang Fb wifes Drag car 64 Comet afx clone my Drag car