The biggest change with the speeders was to bring the front wall back behind the motor, and to extend the rear out a bit further to accommodate 2 more passengers. There have been other changes made, but not really worth noting for the most part. Up until last spring, there was still one that, while repainted, was more or less still in its West Side configuration.
As far as the skeletons go, there has been pretty much no changes to the car. Everything you see was simply attached to the skeleton. If we removed the floor, and the stairs, you would have an intact and perfectly operable WS skeleton car. Our skeletons in operation are former West Side cars 10, 69, and 99.