NA-T on a 7M isn't very cost effective.
I'd highly recommend just getting a JDM 7M-GTE and buying a wiring harness, ECU, fuel pump, intercooler, etc and just doing a proper swap.
Or better yet, save up more and just do a 1JZ-GTE or 2JZ-GTE swap, the 1JZ-GTE came native in the MK3 Supra in Japan and the swap is now very well documented. By the time you add up the costs of properly refreshing a 7M-GTE and swapping it in, its not very far off of a 1JZ's cost.
Better still, would be to just sell that Supra and start hunting around for a factory turbo car in good shape. Spending $5-6k on a truly clean MK3 will more than pay for itself in the end.