A Chevy 350 doesn't make it any easier. I am working on a Ram Jet 350 and just replaced a Chevy MEFI 3 for a MEFI 4. The version 3 did not have a oxygen sensor. The car ran fine at sea level, but here at 6000' not so much. I thought the $1000 for the upgrade would be the easiest way to get the car back on the road. All in all the car runs good, but the idle is a tad to high. I bought some used tuning software ($400) only to discover the controller is password locked and I can not do any tuning myself. The next step will be to send the controller out this winter ($300) and have it professionally adjusted.
