I thought about doing an 'expo' style build on mine when I first got it. I'm not sure if a FWC would have clearance issues with the cab extension as it is about 3-4" taller than the Toyota cab portion. I thought about building a custom bed to allow for fitment of a FWC camper but while I was designing the bed, I stumbled into a '95 T100 4x4 with low miles and changed direction. Mine has the 22R engine which is perfectly suited for the truck. I've hauled dirt bikes/Land Cruiser parts/dump runs up to about 500lbs without issue. The only real negative with the custom cab is the length off road. I've had to do many 3, 4, and sometimes 5 point turns on tight trails to get the extra 3' of wheelbase around switchbacks. That being said, if I was to do a camper set-up, I'd use my T100 with the 3.4 V6. The custom cabs are pretty neat rigs and I've seen a half dozen or so in this area.