Definitely not a WE4. WE4 was available only at the end of the 1987 run. It was black (gray interior) and had blackout trim not chrome. Check your RPO/option sticker on underside of the trunk lid. Then look up the codes right on this site in the reference area.
Your car sounds unique and very much a sleeper. The sleeper sounds good from a couple different angles. Less obvious and maybe less likely to be stolen
or noticed until you choose to make it whine a little. IMHO - a good time keeper. More often they will wonder what it was that went by!