LS is out of the question. I have nothing against it, other than I don't currently own a free one.
The S13 in the picture appears to be RHD based on the wiper motor position, but hes also lacking a visible brake booster and MC. No sign of a clutch MC either. It appears to still have the PS resevoir so I'm assuming the PS lines have been fabbed up even though the AC is blocked off. Looks like no heater either since the heater hoses are missing. I can't see if the steering shaft clears the manifolds or not, or if its also custom. Does anyone know whos car that is or any of the specs on it?
As for the basics ideas, I have an entire running SC400 to pull the motor, trans, harness, driveshaft, etc. out of. The MAFS is in pieces from the accident so it wants to stall unless you keep it running but aside from that I know it runs. Mounts will probably be my biggest issue aside from the wiring. I'd like to convert it to manual, but thats more money that I don't have, so for now, assuming the wiring isn't retarded, I'll stick with the auto.