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All 73 4V's came with the 4300D. In short if you have a squarebore it is a 4300. If spreadbore 4300D

https://www.precisionexhaust.com/catalogs Several members here are running precision exhaust systems and the feedback has been positive.

Looks like some type of epoxy was used to "fix" a fuel leak.

https://jerseyshore.craigslist.org/cto/d/ocean-grove-73-mustang-convertible-351c/6908832381.html Good luck with the sale.

I am no expert but I ran a Q-jet for several years mostly because I wanted to learn about them. One of the differences between a Q-jet and a Holley style carb is that the Q-jet idle and transition circuits have a much smaller range of influence on part throttle driving. This is because the Q-jet...

600 cfm vacuum secondary should do the trick.

That is the Adjustable Part Throttle screw (APT). It controls how deep in the main jet the rod is set. By raising or lowering the rod in the jet there is a small range of adjustment for part throttle main jet air fuel mixture. It doesn't effect the idle circuit.

What kind of carb? You need to figure out what is going on with the choke. Have you tried adjusting it? You should be able to turn the choke cap by hand so that the choke is fully open. Also, if you tuned the carb with the choke being only 1/4 open then you likely are going to have to re-visit...

Not sure this is pertinent but some of the aftermarket chicom aluminum water pumps do not have the bypass hole drilled and that can result in cooling issues.

Can you tell exactly where it is leaking from? The regular Holley blue non-stick gaskets are made to withstand fuels with alcohol. My car sits for months at a time and doesn't see very many miles each year and I have had the same gaskets in it for years with no issues.

Yes the recurved part is an important point with a reman. The OOTB ignition curve is generally not suitable for a performance application. Also, the vacuum advance usually provides too much timing too soon and needs to be limited.

I have a 460 but the ignition components are interchangeable. Duraspark distributor, MSD 6A box and TFI coil.

https://www.mustangbarn.com/

+1 a blue cam a 37 squiter will usually cure most hiccups provided the pump arm is adjusted properly.

I have the FPA headers. They are a little pricey but they fit ok. I had to do minor clearancing on one tube at the steering box. Mustangs Unlimited has all the engine mount components for the BBF.

Who could hate on such an accomplishment?  Frankly I am jealous! Beautiful car!

That carb and basically all Holley style carbs made since the 90's have a backfire protection check valve so it is extremely unlikely the power valve diaphragm is ruptured.

Its a cleveland with 2V heads so nothing special drivetrain wise.

Can you be a little more specific as to the exact symptom? Runs like **** covers a lot of ground. If it is stumbling when you floor it the accelerator pump probably needs attention and/or the secondaries are opening too soon.

In addition to his rebuild videos (which are great) Ken at Bad Shoe is now selling trans rebuild kits. The prices look competitive and he will tailor the kit to your needs. http://www.badshoeproductions.com/parts.html