These Altmount Kits by Balmar offer the opportunity to install a larger alternator than would otherwise be possible. They are designed to fit select engine models, the list expands every day so if you don't see your engine listed do give us a call. This model 48-FSP-100 is for the Ford Lehman Model FL100
Alternator upgrades using a single drive belt are limited by the amount of power that can be transferred by the belt but using a serpentine belt considerably increases the possibilities. The kits include a set of serpentine pulleys to go over the crankshaft and water pump pulley and replace the alternator pulleys and come with a matching serpentine belt. They are sold for specific engine models only. The alternators need to be purchased separately. If you order an alternator with a kit it will come with the appropriate pulley pre-installed. Installation is relatively easy. The kit comes with two J10 55" belts but purchasing an additional spare belt is recommended as these are not typical serpentine belts.
Because the pulley kit uses the J10 belt you need to order an alternator with a J10 belt to go with it.
Read my BLOG POST about installing one of these kits.
My blog post has installation notes for another serpentine kit but I dont have personal experience of installing this kit