OK Guys I'm new to this forum. I tried searching and have not found what I'm looking for. I have a 1977 280Z 2+2 with a L28 EFI engine, Auto Trans car for Parts. I just got a 1973 240Z with the stock 240 engine and round top carbs. I wish to put this whole turbo setup into this car once I get all of it onto the L28. Parts I have to work with: I have a P-90 head. Turbo. wiring. turbo computer. Turbo intake and exhaust manifolds. I will know tomorrow what car these parts came off of but guess its a 280ZX Turbo. I want to take the L28 out of the 77 280 and put all the turbo gear on it. What will I need to do to this block to make it work other than add the P-90 to it? Thick head gasket? Lower compression forged pistons? I also read something about boost Ign timing retard issues when putting a turbo onto a N/A engine. I'm good with turbo system but have not worked with a Z car yet. Had a 91 Talon Tsi AWD & a 1997 Shelby Turbo GLHS that I got some great power out of and think the Z will be an even better platform once I learn how to get it all together. I look forward to sharing what I know about turbos and control systems with you guys when I run across a tread. I also will have some left over parts after this swap if you guys are in need. Thanks in advance, Nelson