Berg Enterprises wrote in their old catalog about this USA made pump and it's problems. The Berg's used to print and have available what they named as " Technical Articles" and sold this "book". They no longer print or have available their book of technical articles and there was a world full of good logical information about why Gene Berg suggested one product design of another product design. Too bad, they stopped printing and selling those articles. The man really did some testing of available products, while he lived, those parts used in the type one engine.
You have Kadrons. I have found those work good, but often need to be re-jetted, due to engine size and cam specs. Stock heads with the Kadron dual one barrel carbs and noisy exhaust ? I think that described your engine ? If your exhaust is EMPI part number
3761 in stainless steel or part number 3418 ( look it up on their web site for pictures) both do not have enough "back pressure" and will cause any engine, stock or modified not to run right.
I have tested both part numbers and they made tuning the engine difficult. Also, the dual one barrel carbs on the Kadron carb kit really like the tuned exhaust, like four tubes into one tube, with either a glass pack or quiet muffler .
If the engine is basically stock, meaning you only have a 1600cc size engine, the Kadrons do not tune out properly. They really need a larger size engine, at least the 1641cc with a mild cam to get enough air flow through the carbs. Otherwise, it's a bad combination. The questionable exhaust, stock heads and possible stock size engines all add up to problems with that combination and the use of that Kadron carb set up.
Put the Kadron carb kit on a 1776cc and they work great ! Or, have A.J. Sims, in CA. modify them and they can also work on 2110cc engines. Once the carbs are modified. He has a web site.