I mentioned this a while back in the aesthetically pleasing AFV thread, but I've had this idea for a WWII period APC/IFV. Basically, you're looking at a 15 ton chassis (think BTR-80), 8x8, ~15-20 hp/ton, with a 37mm gun in a turret like the M8 Greyhound, armor proof against ~13mm ammunition, capable of transporting two fireteams (the four man crew being the MG team plus squad leader). Would there be any technological issues getting this kind of performance out of a wheeled vehicle in the WWII period?