I guess that you can update the suspension and several guys on this site have on other model years...but you have to remember that this is Poo's only attempt at direct drive, so that changes things a wee bit up in the drivers area. The track length is 116 (the only sled I know that ran that odd length). Also, as a budget maneuver they did not put in a sway bar up front. Not to dissuade you from trying things, but if look to add a different front end, you wont have to worry about that aspect. I know that as the years went by they did upgrade the suspensions...an xtra lite in the back with about 4 more inches of travel and a jump in travel up front too. They also had a Lite GT model that had a 133.5 skid in the back that might do the trick. But talk about simple sled to work on....loved that thing when I had it as a kid.
Good luck
-T