I wouldn't bother with Any other system than what is made for an Alltrac, It would be a waste of time and money, im sure you would regret it.
Im going though the same thing right now.
I sourced Used parts.
KYB offers struts, and there are many many different manufactures of springs, stock, drop, or lift.
Koni also sells struts, so does NAPA.
KYB is by far the cheapest option.
Id start searching on the for sale section for a 165 or 185 part out, either system will work. The 185 stuff needs to be modified to work, but will actually set higher than stock and it is beefier.
I also have a 185, and im ordering a set of the BR series coilovers, I think eventually my 185 stuff will get transferred onto the 165.
Or just register your car as an antique and don't worry about inspections.
good luck !!