porsche 928 ,help ,motor swap
 

hi. im new here,im from slovakia and i can have a nice porsche 928 model 86.
but theres a fault at the engine. the seller told me that he run without oil and he broke the engine.
but he gives me another motor ,but from a model 91 or so.
will the drive shaft from 86 work with the 91 ? will the electronics work?
engine is 4.6 or 4.9 ,i dont remember.
i can have the porsche for 500$ :) and it looks nice,so thats why im thinking of it. i have all the things and friends to make the motor swap,but i wont buy it untill i know 100% that itll work.