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I submitted mine on the website link from the forum post.

Virginia Mustang sells higher quality repro fuel senders if you need one.

eBay. Used.

Here are my original gauges restored by Instrument Specialties.  Branda's repro gauges look pretty close except they do not come with the original metal gauge backing cups, and they may not match up perfectly with the OEM electrical connections.  Also, the background looks too black, not charcoal.  I never noticed the difference of the 50 hash mark above the "5" instead of "0" before I read this thread today.  I learned something. 

Instrument Specialties has the exact artwork for the console gauges, and can apply the artwork to any functioning gauge.  They also have the correct charcoal color background.  You should probably call them and verify, but I think you could buy a pair of Branda Repro gauges and have them restored to look like originals by this company.  They restored my console gauges 10 years ago to look NOS. 

https://store.cobranda.com/19shcoga.html?viewfullsite=1

https://www.instrument-specialties.com/contact/

NPD Part AP-GPA.

Recently moved to Florida from Pennsylvania  (two years ago).  Love the endless summer- just make sure you have a pool.  I love how easy it is to make new friends in Florida.  Since nobody is from Florida everyone is open and looking to meet people.  I made more friends in 2 years than I did in 30 in PA.  Everyone already has established friends in PA, which makes meeting people harder.

C9ZE-E is 18.25 inch diameter according to mustangtek.

https://www.mustangtek.com/fanclutch.html

Rockauto.com shows that 2710 is the correct thermal fan clutch for a '69 Mustang with a 428CJ.  They sell them for $27.79.  Most of the Mustang parts suppliers sell the same unit for triple that price.

https://www.rockauto.com/en/catalog/ford,1969,mustang,7.0l+428cid+v8,1132434,cooling+system,radiator+fan+clutch,6812

https://www.rockauto.com/en/moreinfo.php?pk=1793512&cc=1132434&pt=6812&jsn=15

Why did you go with the Hayden 2711? The 2710 is the one that Hayden says is for the 428? Is the 2711 shorter? Clearance issue?

My car is a GT350 small block 351W, which is why I went with the 2711 Hayden clutch.  I found this info on 428cobrajet.org.  https://www.428cobrajet.org/id-fan-clutch

I have received reports that say that certain aftermarket clutches made by Hayden (catalog available on their web site) will fit. Part number 2765 (1.09" shaft, 3.25" bolt circle diameter, 7.20" diameter clutch body, 2.67" overall height) is supposed to fit with the C9ZE-E fan. This clutch is available from NAPA under part number TEM 261306. Part number 2711 (1.40" shaft, 3.00" bolt circle diameter, 7.20" diameter clutch body, 2.98" overall height) is supposed to fit with the C8OE-B fan. This clutch is available from NAPA under part number TEM 273370.

Here are two pictures (picture 1, picture 2), courtesy of Jim Woods, that show the 2765 clutch compared to the C9ZE-B clutch.

The funny thing is that the Hayden catalog says the correct replacement for a 428 CJ is part number 2710, but in looking at the description in the catalog it's clear that the 2710 will not fit. The bolt circle diameter and height are both wrong. Hmm... 

I found this information in a General Spring application chart.  It shows the aftermarket part number of 42-503 as the correct spring for a 69 Shelby.
I don't know if this information is accurate or not.

That would be a replacement substitute no better then the universal replacement that Ford sold for decades to fit just about all Mustangs 65-70. I have bought ones from Virginia Classic Mustang that look the same but are a little less then Eaton plus Brant is a forum contributor. Basically you get a generic replacement regardless of who you buy from.  Eaton covers their springs in a thick black paint which for a driver is fine because they will be well protected from the elements but get ready for a major amount of work trying to get all that paint off if trying to make them look close to original. Virginia's still have paint but not near as thick.   Regardless of where you get a replacement the leaf's will not all be the proper length and the bottom leaf will look different . At least compared to a assemblyline leaf .

Based on info in an older thread, the VA Mustang leaf spring is industry replacement number 42-437, which has free arch of 6.25 inches.  The 42-503 spring listed by General Spring for the 69 Shelby has free arch of 3.75 inches, which would provide a lower ride height.  It is likely the spring rates are also different.  Fortunately, my early original leaf springs stamped 5RS68 are not sagging.  However, the original front and rear bushings are cracked.  I should pull them off and change them, but the car rides nice as is so I haven't messed with them. 

I found this information in a General Spring application chart.  It shows the aftermarket part number of 42-503 as the correct spring for a 69 Shelby.
I don't know if this information is accurate or not.

How would adding a clutch to the fan increase cooling at idle over a fan w/o a clutch?

It won't unless you install the proper fan.  If you can bend the blades on your current fan with your fingers, then you have a flex fan.  They do not move nearly as much cfm of air at lower rpms as a rigid, heavy gauge steel, 7 blade fan.  The 7 blade 428CJ fan blade pitch is also deeper, which catches and moves more air.  If you have a FE big block, I suggest you buy a Hayden 2710 or 2711 clutch fan and install a repro or real 7 blade 428CJ steel fan instead of going to electric fans.  Look at the Hayden specs for the proper depth of the shaft you need in your application.  As an added bonus, a proper functioning clutch fan will increase horsepower by reducing the resistance on the waterpump shaft. 

I installed an ACP 2 Row Aluminum 24 inch radiator with 1.25 inch tubes recently.  The 20 inch radiator and the Boss 302 flex fan wasn't doing the job in the Florida heat.  After installing just the 24 inch aluminum radiator, the coolant temperatures were slightly better, but the coolant temps would still reach 210 degrees if idling in a traffic jam on a hotter day.  I installed a new Hayden 2711 thermal clutch and a 428 CJ reproduction 7 blade fan.  The clutch fan made a huge improvement - much more so than the 24 inch aluminum radiator.  I let my car idle in the driveway for 25 minutes with the hood closed and the coolant temps max out at 195 with the new clutch fan.  I have an accurate coolant temp gauge.  The ACP Direct Fit radiators truly do fit the factory Ford 24 inch saddle brackets.  The welds on the aluminum radiator are beautiful, and it is a high quality radiator.  I spent $500 for a 20 inch US Made radiator from US Radiators in California 5 years ago.  This new 24 inch radiator is much higher quality than the US Radiator was by a wide margin. 

I also need a piece of a gold stripe for my 69.  I am afraid I might peel the early 1980s paint off with the damaged stripe so I just live with it.