motor swap to a 84 gn
 

Hi , I have three grand nationals 84 86 87 . I just bought the 84 no rust at all
the 86 has rust this is what i want to do . I have new motor that was for my 86 .but i want to put it in the 84. The 84 has digital dash 86 dont I took the engine wire harness out of the 86 and the ecm.will this work with the dash? do I have to switch any thing else? is their other thing to swtch over ? I took the power master booster off too. when i look at fuse box thier no fuse for brakes.
mistake i guess. do i put the 84 hydroboost brakes back on ? thanks

Sorry for the slow response, to answer your question, yes, engine harness will work. You will need to run power to the brakes though. Or I would change over to vacum brakles.