Hey guys, looking for some part numbers... I don't have the books. I have a guy who wants a track and wanna make sure I don't give him the wrong one! The part number in question is 39125-3512... pretty sure Invader, but I've got a 78' w/ 3513.... I think the LTD's are 3515A and Interceptor 3517. Maybe just a different yr/part number? 3512 vs. 3513? Thanks for any help! Tory