What are the visual requirements for C.A.R.B in 79? My guess is EGR, cats, and a pump on the outside. Based on your engine description, it's an easy fix. What type of distributor do you have? Bosh or other? Bosh will mean it's a black Australia engine. Do you know if the engine was original black or blue? Do you have any type of bulkhead reduction kit because that will dictate weather a pump can be mounted easily or not. If not, are you running a SD-508 double pully AC compressor?
It will take a little money and work to do this but it's not a big issue, don't worry, be happy. OMG did that just come off my keyboard? Really, if you want to drive in daily, no worries.