Does anyone know the GATES cross reference part number for the 9N-8620-B fan belt? New ones these days only seem to be the 9N-8620-B (all -before s/n 263844)and the 8N-8620 is after -for angle mount distributor and new genny. Archives show lengths on early belts A, B, and C vary from 43"-45" but so what? That's why you have belt tensioning, right? I have a GATES - TRUFLEX p/n 3460 (5L460) but don't know what it fits.