just junk that motor, with that many miles its not worth it. event he fact that its a d15 makes people want to swap it out. instead of the Z6 just opt for a B18B1, its an engine from a 94~ integra. that would probebly be the most hassle free swap you can do and you'll have an awesome platform for a turbo. the B18B1 is also a good swap because you wouldnt have to do any wiring for VTEC. all you need for the swap would be the engine, tranny, axles, ECU, wiring harness and motor mounts.