So I scored an 1982 N/A D24 & M46 w/OD today

[D24N/A]

The IP Belt is Really Sloppy but Not Broke. I don't know if it runs or not but want to change the IP Belt before I attempt to fire it up. I think I want to change the Front belt as well. I never have changed the Belts on a D24 or a D24T before. I remember finding the Proper technic on here once before but don't seem to be able to find it again. Any suggestions on either finding the link or on swapping the belts? Thanks in advance.