Last night I was putting a new 130 amp alternator in my '87 F-250 and found I couldn't get the two belts over the pulley on the new alternator. The new alternator is slightly larger and will not swing toward the engine far enough to even stretch the belts over. The truck has a 460 engine and used to have a stock 60 amp alternator. I am planning on just buying longer belts. I am wondering if anyone has had a similar problem? Is it possible I have the wrong alternator or will new belts be a simple fix? Thanks for any advice.