I measured my belt while it was on th car, I just sort of ran the string over the pulleys and belt while it was on there. The string is 90", isnt that kind of big? I also went to the NAPA website to get a number for a pulley and I have 2 options, serp belt for auto and serp belt for Manual trans. My car was originally equipped with a manual but has since been converted to AOD, so which should I get? Sorry for the stupid question, Thanks. Its an 87 5.0 with All accessories. -Skip
Stock belt length on a 79 5.0 is 93.5 inches. I think newer ones are a bit shorter because the AC pulley is smaller. It is easy to check the catalog data for lenght at the parts store. Sometimes the best fit varies by 1/2 in or so between cars. If you have removed accessories, all bets are off, you have to measure and experiment.