Stoffregen Motorsports

Man, it sure sounds like a carb issue to me. Are all of the mounting nuts tight? The "bigger" idle jet is common on the primary side. Does this carb have an idle cut solenoid? If not, you can install one, and it will help with dieseling. Finding jets for the large jet holder is not hard. I believe Pierce sells them. Any place that stocks parts for DGV Webers will sell those jets.

You're not sup[posed to do any "work" to an IT head. They were supposed to be bone stock.

Yuck. Get rid of that pile of junk. For what it's worth, those DGV adapters make great pieces for modding manifolds. You cut out the plenum and flange and can weld them up to a manifold that has has a small plenum and the wrong bolt pattern. I've done it a few times.

Yes.

There are two fuel jets, two air jets, emulsion tubes and pilot jets.

What jets are in the new carb? If the only thing you changed was the carb, then the problem is either in the installation or in the jetting. I really doubt there's any issue with the carb itself. If you did other work too, then what was it?

-3 AN is usually big enough. The turbo drain needs to be huge though.

Stop removing the cap and watch the coolant level in the bottle. Every time you loosen the radiator cap, you're allowing air into the system. Top off the recovery bottle a few days in a row if need be and see if the level begins to remain constant. Note - you need to have a siphoning radiator cap. Note - you should not fill the recovery tank to the top. It needs room for expansion. Note - the recovery tank should be adequately sized. If it's too small, it will puke fluid out of the recovery tank during its cycle.

You can check the preload. Best to remove the brake pads or the caliper or simply push back the pads in the caliper. Then get a cheap fish scale and pull on one of the wheel studs. If it's more than 12-15 pounds, they are too tight.

It was really nice to drive.

Nothing beats the sound of dual side drafts.

Weber DGV on a common plenum manifold actually have more usable CFM than an SU setup. As far as Weber vs Dellorto, Weber for sure. The Dellortos are fine, but you'll find a lot more info (and parts) for the Webers.

I miss my little 320. Almost bought another one last year, but it never came to pass...

Isn't a cast manifold already available?

Rancho 5000s were my go-to shocks for many years. They are inexpensive and simple, and they are hydraulic. Or at least they used to be. (EDIT - unless they changed, I'm sure they are still hydraulic. It should say in the listing notes) I have since switched to OME or Bilstein shocks, which are both gas charged. Difference? Hydraulic shocks are generally softer and smoother, but gas shocks seem to be able to handle quick changes more easily. Gas shocks also add height, while hydraulic shocks do not. I would use hydraulic shocks on anything that will see off-road use, and gas shocks on trucks where road manner are the chief concern.