Nice to see someone in the Eastcoast with another 12a in their 210. I have a 12a in my 79 210...running pretty good with a Holley carb...got a little bit of running rich problem causing it to stall. Probably going to have to rebuild the carb and maybe replace the fuel pressure regulator as it it looks like it has stopped working. I have the tranny of a 85 RX with the rear end of a 80 210. Keep us posted on your progress.