I would kinda do a Martin Aparijo-ish tribute.
First: No mags. They were totally played out by '87. Chrome rims.
Black frame with all black soft parts, and the stem and levers and powerdisc. Stock decals. Forks the soft blue, same as the decals. Bars, same blue or possibly chrome to match the seatpost. Then just a touch of white; cables and seatclamp.
All that is just spitballing.
I was just saying I'd go with a black frame, were I to build one, that's all; and I like how Martin and Eddie swapped forks and bars and seatpost colors around frequently. My opinion is that those combos were ahead of their time, and more aesthetically pleasing. I always thought that most stock complete painted GT's always had too much of the main color all over the bike in a cookie cutter way. But that's just me, for my personal build. I can still dig it when I see an old ad or see a new factory correct build.
Build it your way, bro. This project is about satisfying yourself!
Just as an example, the only scanned image of Martin I presently have on my computer: Dig how he sprinkled that chrome frame with purple, orange, black and white parts. Not too much and not to many. Unorthodox, but still balanced and appealing.
Dare to be different. Be creative. Most of all, have fun...