lol, please don't put an sr in it, just build up the vg30 in it. You can find some turbo exhaust manifolds for relatively cheap, and do an na->turbo conversion, you'll need some parts for that though. Best place to look to do z31 upgrades/mods at is
z31.com | Home. I will warn you, there isn't much aftermarket support for z31's specifically, so upgrades can get expensive.