Scouser

Man, everytime I see a thread about the olf Fun Factor i really miss the days of trying to work out how to fit a big block, compatible cvds and all the other stuff. Some great trucks came out of those threads!!
Some useful upgrades for your FF would be aluminum brake seat, heavy duty diff gears (crown and pinion), plumbers compression fittings for your diff cups, DrHondas shock towers with two pair of Matrix buggy front shocks, New Era Models roll cage is a great addition aswell if you can still get them and a full set of cvds.
These cars are fantastic vehicles and massively underestimated by the general r/c population. If the old issues with the drive and diff cups have been sorted, then these things will just keep on going.