I installed the Flamethrower and it really has transformed Midgie's engine into a really good running unit. Cold start is almost instant on with full choke. The misfire/hiccup/burp in the idle is no more. Idle is rock steady at 1K RPM. I think I've also finally got a good setting on the SU carbs, as I had very little backfiring when letting off the gas.
Test drive was going to last about 5-7 miles, but went more like 35-40. It was the most fun I've had in the car yet! Plenty of power in all gears now. On the interstate at 70 MPH I still had plenty left to pass a semi, which was unheard of before. I took it up to 75, which for the shape the suspension is in, I think was fast enough.
Install wasn't too bad. Stumbling blocks were having to take the distributor hold down plate off and stretch it out a bit, because the Flamethrower has a bit more girth where the plate fits around. As usual I got the plug wire order wrong, but quickly figured it out and got it sorted. The white/black wire that went to the Lucas distributor no longer has a function to perform.
In the test drive the only problem I had was after I stopped for gas about 25 miles into the drive. About two miles away from the station the engine backfired and started running rough. I thought I had a bad tank of gas. When I checked under the hood number 3 plug wire had slipped out of the distributor cap. I took my flathead screwdriver out, spread out the connector a bit so it would catch the side walls, and problem solved.
I have to say so far I'm impressed. I'm interested to see what it does for my fuel consumption too.