I have a mid 80s 448 (repowered with a performer 20). I am for all purposes the second owner and the Caster is original to this tractor. I dont know if it is the P84 or the N84 I dont know the difference. It is very beat up(it has tangled with fences and stones) but still works having used it this past season. I have found and purchased an older but in marvelous condition L84. I have looked at both manuals and see that the Auger chain adjustments are done differently and i also noted that the L84 manual never references the 448 but i believe the 448 did not come into existence until later. I already know that i need to keep my lift arm and will keep my chute crank, but are there any other fitment issues/powering issues i need to be aware of. Im selling the one i had but dont want to find out something needed to be swapped after the sale.