Smog and A/C delete. Need belt size.

5LugFoxFanatic

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I did a search and found so many different answers. I have an 86. I am removing the smog and A/C, and will be using the FMS A/C Delete kit. I am not sure which size belt I will need. People say 70.5-73 inches. I think in the end I will have to take a tape measure, but my friend did this swap in his 1990 and he said that the belt rubbed on itself not having to go around the smog pump, going from the crank to the alternator. Anyone else run into this problem? What size belt did you use?