Before i start the swap i got a question, i have read that to do the swap i need to a turbo with the 5 speed, the drive shaft must be modified. now my question is, could i just keep the z 4 speed, but put in the turbo engine? thanks.

 

yup...

 

or better yet, get a 280Z or 280ZX 5-speed. (non-turbo Nissan brand) It'll bolt in and use your existing driveshaft.