I still haven't got my engine running right, I'm beginning to suspect mechanical trouble. It sounds like it's got a miss. I just pulled the valve cover, and everything looks to be in order, but it was a fairly cursory inspection. Cam lobes all looked good, and all parts appeared to be in place. Plus I ran out of gas. I'm thinking at this point that my cam timing may be off. When I changed the head gasket, I didn't use a new timing set, and it was a little hard to determine which links were the "shiny" ones...The problem with this theory is that the car ran well enough before the megasquirt (that is to say: after the head swap, but before the megasquirt), so I'm tempted to point the finger at that...then again, it ran slightly better before the attempted burnout, so maybe it jumped time? Anyway, here is an updated picture of the car equipped with the MOMO quasars.