So I picked up cruiser at a garage sale turned out to be a schwinn from 79, just noticed it has a 3 speed shimano nexus inter 3 hub, and it's freewheel, with no linkage for it whatsoever, just a hole through the axle, anybody know where I can get the parts to hook it up, all parts and info I find is for the coaster brake model only. Also, instructions or a point in the right direction as to how to hook it up would be greatly appreciated. Anybody know what model it might be? Doesn't have the chainguard, it does have straight tubular forks though, which I thought was odd for a 31yr old cruiser