The Toyota Supra 7MGTE turbocharged engine is one of the platforms we rebuild here at Synergy Engine .   We do not offer core exchanges, and will rebuild your supplied engine core for the build.    This engine can be rebuilt with off the shelf performance parts, but is lacking in the OEM parts availability.  From mild to wild, the 7MGTE engine is one of the best import platforms on the market.   Rebuild turn around is roughly 4-8 weeks.  7M Cylinder Heads are Mechanically Adjusted here in the shop, which call for extra labor time.  Full JDM Swaps are available, and make great performance rebuilds.