The NT model years are from 85 > somewhere in 88. Yours was probably made in 84 for 85. There are a few odd combinations around during swap over years though. So you should be safe with anything that says NT or 85/86 > 88.
What bits are you looking at upgrading?, pics of the current bits you have will soon sort any confusion out. And any pics in general are good!

Cheers, feel free to check out my high top
