If its a 2E2 it will be stamped "2E" on the upper side of the casing.

The fact that the auto choke is disconnected points to choking problems. Slightly rich running would point to the waxstat holding the choke on slightly. They probably thought it was the autochoke that was defective when it was in fact the waxstat! Put a new waxstat on and reconnect the autochoke and it may actually work properly! Its fooled many an experienced mechanic. The autochocke is otherwise reasonably reliable - if you remove the autochoke cover assembly there is a bimetallic strip in there with a bit of curly wire - its really fragile and breaks really really easily - if its intact I'll lay money the autochoke is ok.

Over run and rough running on deceleration are classic 2E2 waxstat symptoms.

Its not a reliable treatment but Ive reset a couple by dropping them in a pan of boiling water treated with anti boil mix. If you are going to replace it it might be worth a shot but get the water really hot. The waxstat is very easy to remove - you unscrew the two screws and it should with gentle pursuasion pull out, if its a 1987 car it should have been replaced at least twice in 20 years.