3406b running rough

Don't give up on that hole. Could be a pump issue as well - may need lapped or unit pumps replaced. Just a heads up to anyone going through that- I sure would not recommend mixing or b&p assemblies with aftermarket in the same pump. I ordered a couple of aftermarket made in Italy a while back to compare. I was surprised at the fit and finish quality. Looked really good. But there is a slight, maybe 1 or 2cc difference in the capacity. Aftermarket being slightly higher iirc, just enough to create an imbalance but not enough to call it an upgrade. However, I would not be afraid to try a whole set if oe becomes hard to get. Came from ebay, btw.

 

I ordered my new cat nozzles from shop.cat.com or something like that. They were made in Brazil but came in from Morton in less than a week