After the bash and being large time unhappy with my TMI seats I decided to install the new carb that was sitting on the bench. It's a SUM-M08500VS 500 CFM 4V similar to the 4100 and Holley's remake. Since I live at 8500 feet the first thing I did was change jets 4 sizes down from factory. 

Well, it was super cold-blooded. Started easy with two pumps and then was damn near impossible to keep running even with feathering the throttle. Once warmed up it seemed to work better but still had a stumble when accelerating. Full throttle was OK. The carb pissed me off, same as the TMI seats. 

So I found some 2011 mustang seats to fix the TMI dilemma and I am here to say that was a good choice. I'm going to Los Alamos in the morning and have decided to take the 67 even with its stumble. Carolyn was surprised I would take the Mustang as she thought it ran like crap.

Today I decided to up the jets as it would go uber lean at the touch of the throttle and I will also be going  down in elevation. I popped the top and changed the jets and also checked the accelerator pump linkage. It was loose as a goose and would not start moving the pump until 1/2 throttle. I adjusted the pump and buttoned up the carb. I also checked to make sure the ignition points were still pointy. All looks good.

Test drive time. I headed down 285 to the gas station to fill up (7 miles) and the station had all its pumps closed. I'll grab a beer instead. The carb worked flawlessly to the station and back and AFR was 14.5 or so. I am now happy. New seats, good running engine. Los Alamos, here I come.

Moral of the story is: Don't trust the manufacturers "Runs great out of the box" claim. Check all adjustments before bolting on the carb.