Lets shove an RB26DETT in that bitch!!!!
Dude you ever heard of a Nissan Silvia?? 240sx in US=Sivlia in Nippon.
The only different really is the body styling and the engine. The 240 comes with the KA24(2.4L NA) while the Silvia came with the SR20DET(2.0 turbo). You could do an sr20 swap but i bet if you turbocharged that KA you could get more power...but i dont know im a VW owner, I just study cars to know what competition is out there. Pick up a Super Street I think they are still doing the s13 project in there. They love nissans in super street.