Reply to "Holly ultra issues"

Push, from your photo, that carb body was smashed or badly made when Holley did the assembly. Zinc castings cannot practically be welded (zinc catches fire if welded in air). It may be that Ultras use an aluminum body. Some but not all cast aluminum can be welded. Aluminum carb bodies are relatively recent and I don't know what alloy is commonly being used.

If it was me, I'd fire that chunk back to Holley ASAP, but given your location, I suspect the car will not be driveable this year even if it gets fixed free. Shipping 9 lbs of metal across the pond- twice- is not cheap, either. Probably your best alternative is to take the damaged carb to a local machinist and ask him to pull the air bleed out and make a pressed-in aluminum bushing that can then take your stock jet in the std. manner.

I realize this is a lot of trouble, including clean-up afterward, and not your fault, but it seems like the quickest, cheapest overall solution for you. Of course, buying a new carb and contacting Holley for a refund will also work if you have the extra cash and the patience to follow up. If you do this, be SURE to mention that you belong to a large car club with an Internet site, and photos of the badly made carb are already posted showing their quality.... And other members are watching for their response.