Sort of. The way it is set up gives you the most address setup time. That is, address on the buffered bus is valid long before the falling edge of ALE. Keep in mind, though, that when the original 186 came out, memory was slow. By using an edge triggered latch, you are also changing the address to READ and WR times.
BTW, congratulations for using a 373 and not the stupid Intel part. I would use the HCT, though.
Tam
Tam