That's the one I have installed on my 91S. Fit in straight with no problems. Much better than that Murray thingy, which froze up and leaked in my car.
So far, the LS doesn't seem to need one, as since the a/c works really great, I get cold air almost immediately even if there might be heat soak in the heater core like the 91S has.
The 134a converted a/c in the 91S is just not that great, even with new components, including Roadtrip's recommended replacement condenser (which BTW, was pretty easy to install). The a/c gauges do read as they should, but still, not like the LS, for sure.
1989 Milano, Shankle Sport
1991 164S, stock
1994 164LS (~Q)
1972 Morgan 27
previously owned since 1964:
62 Morris MiniMinor 850, 67 Austin 1275 Cooper S (Downton 3/4 race), 64 Giulia Sprint GT (1st red one made), 72 Fiat 128 Sedan, 75 Alfetta Sedan, 78 Alfetta Sedan, 78 GTV, 81 GTV6, 86 GTV6