I've had welded front and rear trackers in my group, open ones that launch 10' high and keep going after landing, and have done toy axles and 38's on one. I LOVE trackers. They are tough as ****. I think the front diff is a weak spot, but sounds like there is a fix. If you tube chassis'd one and kept the front bulkhead or modded a new one and linked the rear I bet you could hurt some feelings if properly executed. Didn't JT somethingorother from NC have a GSXR smaller bike motor, then a busa hooked to a sami trans? possibility. As mentioned, PS could be a problem. Get a suby elec PS unit, maybe whole rack since we aren't talking full hydro