I have the old tech card for my Holley G3 1250 3-circuit it came with originally, but nothing on a G3 1050...sorry. Its now Thumperised 2-circuit. Only issue I have with it now is it is a little lean while cruising since I went to a forward facing scoop. Prior to that, I couldn't get out of the driveway with it. Tried everything and it was way too rich on the mid range. Couldn't cure it. I has gone 9.90 already in that car with muffler and street tires on pump gas.

Send it to Thumper...You will be very happy you did. I have two of his carbs now, and I like both a lot. Minor jetting is about all that is usually needed.

Just got my newest Thumper 1050 running and a couple test hits on it last weekend for our first outing. Going to tweek the jetting richer with 94's square from 92's and see if we can get some color on the plugs this weekend.