Don't know the lenghts but the front ones i got from Paddock couple a years ago where sooooo
long you could tie 4 passangers in with one belt. Joke you not, one belt of a set would reach from
mounting bolt across the seat to the other mounting bolt.
I ordered up a set of 60" belts with retractors. I will see if these are the right length for the front (if they are too short they will end up in the rear and I will have to order up the next length or 72" for the front).
I'm using different seats and have moved the platforms around a little so I will have to see.