Thanks for the link, I joined the forum there too. I searched on Autometer.com and came up with this:
Honda, 2 & 3 Door Civic/CRX 88-91
Is this the gauge pod you were talking about that should be a good fit for my Legacy's pillar? They don't list a 2 5/8" pod size, only the 2 1/16" size. Hmm. Anyone know any part numbers for a pillar pod that can hold a 2 5/8" gauge in my Legacy? Close fit?