Swapping 87 motor for 85 Gn motor :want advice

[new2boost]

anyone swapped in a 87 GN motor for a 85? I have a 87 T Type that I want to put the motor from in my 85 GN is this as straight forward as I think it is? I will need to put the computer in also correct? Should I swap in the trans too? Let me know what to do/expect...as my username implies I am new turbo buicks ...counting on a little help from you guys the experts...tonyalester@earthlink.net

 

[nickb]

Why would you want to swap a 87 intercooled motor for an 85 hot air motor?

 

[Pat Adkins]

nickb, I think you read it wrong he is putting a 87 motor (from a ttype) in his 85 gn
trans would be a good idea you will also need wiring harness & computer

 

[new2boost]

85 out 87 in

sorry if I made that unclear..but I am putting the 87 motor in the 85 GN everything should go pretty smooth correct? No fancy wiring or anything like that? I have the whole car(87 T-type) So I have anything that I need. Is the rearend any better in the 87?

 

[thomas_quinn]

Rear is the same. swap the tranny. I have no clue on the wiring but if you have the hole car swap the harness

 

[NASSTY]

If possible you should use the 87 wiring harness.That way you will have the fan relays and the mat sensor.Swapping the harness can't be too hard if I can do it. If you want to see my 87-85 swap look below in my sig. at Pics of my Buicks.

 

[new2boost]

2nastybuicks

the Gnx replica is great where did you get the pieces to do it at(grill emblem,fender vents, wheel well lips, turbo shroud, and wheels ..did I miss anything?) I believe I want to turn my 85 into a Gnx clone too...let me know something.

 

[nickb]

OK sorry makes more scence now.

Nick

 

[49-blues]

what brake system do you have on the 85? if its the hydroboost-you would have to change to vacuum system also.

 

[NASSTY]

85-87GN/Ts came with the power master brakes,84s had hydraboost brakes.