i am swapping a 280zx turbo motor into my 71 240z. the garage is going to open the 280 motor today. is there anything i should look out for, or ask questions about? is there any parts that i should get to make it run well or better? this is of course more performance parts that i am talking about. about 300 hp is what i am going for.

A valve adjustment and a compression test is a good starting place. It can indicate to an experienced mechanic the general condition of an engine. I'm not a turbo guy, but I would think that 300 H.P. from the 280ZX motor is certainly obtainable. Money makes horse power! Lots-o-money makes lots-o-horse power!!!