Ha, re the VW bugs. I always admired the air-cooling feature of their engines.
I would so be searching the archives here for info on adding any tachometer. Lately I use yahoo's search engine, since it will search for phrases within this site. E.g. to look for info on adding a tach, try going to yahoo.com and typing in the search window:
"add a tach" site:honda-tech.com
One of the biggest barriers brought up here and elsewhere for adding OEM cruise is the fact that the DX gas-brake pedal assembly needs to be replaced with one from an LX. This is because the CC actuator cable connects, via levers, directly to the gas pedal. The DX gas pedal does not have the levers. But truth is, it is not that hard to replace. I thought it was going to be, but it went fine.
Using one of the Rostra (= audiovox, I think) aftermarket CCs works fine, from my reading, with one caveat: Most folks probably end up connecting the CC actuator cable directly to the pulley on the throttle body. The end result is that when the CC is on, the gas pedal is loose and floppy.
Not sure what you mean by a worn out modulator. It seems to me CC actuators and computers last a long time. Should a junkyard sell you a bad one, most take exchanges for 30 days.
I believe the LX version of the 90s Civics typically came with cruise installed at the factory.
This is a great forum. Some whackiness (and often some gross conceptual errors... not that I am always right) but the archives often solve a problem I am having or shed new light on one. Personally for me, even just reading posts that note, "if you can do a timing belt, then you should be able to manage this... " helps when I am trying something totally new.
120,000 miles on that little Civic, ha, it almost makes me wish gas prices would go up again. A few months ago I was getting all sorts of envious eyeballing of my wheels!