Hey guys, Pretty much as the title says. My 87GT-S's 3sge just started billowing smoke and the transmission has bad 5th gear pop out. I found a supposedly rebuilt 89GT-S's 3sge with a good transmission. I now am realizing that there are a few things that were revised like egr operation, and exhaust header. What else was changed, or more specifically, what will I need to change to get the 89 3sge in my 87 GT-S? Reading the thread just below this one and a few others I'm thinking I might need a different ECU too? Does that mean changing some wiring too? I'm planning on just capping the egr as the car is smog exempt now, so I'm not to worried about that. Any help would be awesome!