there are 2 sizes for the ABF engine without A/C:
92-95 = 976mm
96-97 = 1038mm
you'll also want the power steering belt I'd imagine. PAS belt has to come off before the aux belt, 3 bolts need to be cracked loose so you can slacken the PAS pump. Theres a big one thru the pivot bracket, 15mm iirc, and 2x 13mm bolts. one thru the middle of a toothed nut thingy, and the other is on the back face near the bottom, it goes thru a sloted hole in the alternator bracket, will become obvious when you look.
Once thats off, the alt belt is replaced by twisting the tensioner pulley arm till the belt comes off, there are no other bolts to loosen. what i do is hook a large adjustible spanner over the tensioner arm, and use that to lever against the tensioner spring.
alternator itself is held on with 2 bolts, easy.