Throwing it all out and starting over. I'm definitely doing something wrong here. MPG was 27 original and I leaned it out to 31 MPG tricking the computer. It pings real loud at all speeds at that setting. I installed the water for gas system and it dropped to 30 MPG. What did happen is it started running like I have a large 6 cylinder under the hood. (it's a little 2.2 liter 4 cylinder.) More HP is not desirable in a climate that freezes.
Leaning the engine further got me heavy detonation, the type that does damage. I'm looking at the amount of valve overlap as a possible cause. I have very good compression according to engine specs. We tried an SU side draft carb. to to see if if fuel injection system was the problem. That's not it so time to start over from scratch. I may end up swapping engines to get this going. So far new Oxygen and MAP and Throttle positioning sensors have been installed with no effect.