Most z have high mileage is there anyway to get a new engine without having to do much to the car, i also want to turbo it. any suggestions?

 

buy a complete turbo motor, loom, afm etc, take it to an engine shop and get them to rebuild it for you, then when it is done, take out your old engine and bolt in the new one.

Or you could just buy an RB25DET or 1jz-GTE

72 240Z restoring
72 240Z RB25DET Conversion
78 260Z 2+2 Daily Driver