Although still not cheap, I don't think that it'd be outrageously expensinve if you used the SR16VE head and bolt it up to the SR20DET block (relatively speaking). Again, the engine mgt system will need to be replaced from the stock SR one, but I've actually read about a NX2000 w/ the VE head on the regular SR with a turbo on it. I'm not too sure as to the details since I read it over 3 years ago, but I know it's possible.There are many other ways to improve the lower rpm power w/o resorting to the VE motor, and the headaches associated w/ it. For example, JimWolf is coming out w/ a 2.4 kit (for the SR) that would probably be more effective in bumping up your power levels as well as low-end torque. It'll probably cost just as much, too.

If you can make it work, I think that it'll be seet. My question is why are you wanting to do this? Is it for the shock factor or b/c of the drivability? There are many ways to accomplish the same goal, but not all of them are cost effective, nor reasonable. However, if you've got the money to burn, and/or standing out from the crowd means that much to you, this'll do it.