I've actually looked into turboing my l20 and have come across other people's post. Hopefully this might help. Good luck on your build. http://community.ratsun.net/topic/57895-datsun-510-l20-looking-for-turbo-kit-for-it/
I live in Yuma, Az. Ill even throw in my modded cross member for the 620. Member sits 1.5 inchs back and .5 inch forward. Only work you'll have to do is shorten driveshaft, external fuel pump and mod your tie rod end.
1jz also known as 1jzgte, is from toyota. They are older Supra engines, I believe come off of either the mk3's years 90 to 93, or Soarers. Most mk4 Supras come with the 2jz, aka 2jzgte.:D Im a toyota guy at heart.:P
I dont want to ship anything only cause it"ll be more to ship then what you"ll be buying it for. I just really want to get rid of everything cause its sitting outside my house taking up space.