K&N Rich-lean monitor

[G. M. Roberts]

This is a non fuel injected question, however I thought that the 
expertise of the group may be able to answer it. I have a 1987 El 
Camino with the Rochester electronic feedback carb. The prior owner has 
disconnected the computer and some of the emissions hardware and I am 
trying to get it all back together.  What I would really like to do is 
switch over to fuel injection, however I don't have either the dollars 
or expertise at this point. 

I saw in a book that K&N sold a rich lean monitor that is used as a 
tuning aid.  It utilizes a probe that is welded into the exhaust 
system. Has anyone used this and would it help me in my application?

George

Clark, N.J.