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An 850 is fine for a warmed up 440.

Dominic has a good reputation in the custom Holley carb world. I use Dale Cubic @ CFM, but I’ve never heard / read anything bad about thumper dart

You just posted on social media. :thumbsup:

Calm down Bob. It’s going to be OK :thumbsup:

:popcorn:

I believe an 850 has 1.75” throttle bores. A 750 has 1.6785” bores, if I’m not mistaken

Wow! Nice work

I’ve bought them online. It’s been awhile, but I probably found them on eBay

You will need a specific pair of crimpers to crimp them properly. It squeezes the sides and pushes the center in simultaneously. If you just sqeeze the sides with knippers the clamp will “egg” and not clamp concentrically

Oetiker clamps.

Depending on your timeframe and what you are looking to do (Correct restoration or hot rod mods), you have one of the best custom carb shops in the country 1/2 hour east of Norwalk raceway (summit motorsports Park). Dale Cubic at CFM modifications. https://cfmperfcarbs.com/

I’m not digging the over the valve cover deal. Plus it looks like the sharp 90 at the inlet will be subject to kinking

Here’s what I did:

Also, if mating stainless to a brass fitting, they are usually “one and done”. Meaning, once the stainless takes a set on the brass fitting, it will likely not seal again due to the stainless leaving a ring on the brass.

I learned about those copper seals from the guys at NASA. I was having a hard time sealing stainless AN fittings on my hydraulic steering system on my boat. Seco seals is the brand I used and was recommended to me by the NASA dudes. I bought them from Pegasus (google seco seals or Pegasus)

Here’s a pic:

I used a 6 pack coil bracket and bent my own fuel lines from 3/8” stainless.

I bought a reproduction one several years ago, clipped it on, and it’s been working fine. You probably just got a bogus one. Unfortunately, about 80% of all reproduction parts are junk.

Here’s a pic:

I cut and blended the flat part between the front two runners out of my street dominator. Gets rid of the Holley advertising and looks better IMO. I know it’s not really on topic, but I’m just throwing it out there.