Brian, I know you don't FB, but maybe you can view this:
https://www.facebook.com/groups/6119...2446790255748/
I asked about those gauge clusters. I guess even with the optional turbo, you could still get the basic cluster.
The turbo sport option I guess had the deluxe or sport gauge cluster with 125mph speedo and actual gauges.
I have actually tried a couple radiators. I did have the factory 2 row copper core originally, but it needed replacement. I found a 1" tube, 1 row aluminum one Spectra Premium or similar. It has been ok with normal use, but seemed like I could use more at nearly 400hp. The stock replacement can be helped by using a better cooling fan. I have been using a bigger fan for several years. I can get you the model number if you like.
The one you can almost see in the pics is a customized 3 row aluminum radiator designed for a 66 Mustang. Brian modified it to use the factory lower pin mounts, trimmed down the top tank (I think he actually remade the top tank entirely), and resized the inlet and outlets to accept the factory hoses. I don't know what the final tally is on just that, but the part itself was reasonable on both Amazon, and ebay. It did require some clearancing of the radiator support, because of my existing intercooler piping. You might get away with less changes.
Here is the one I bought:
https://rover.ebay.com/rover/0/0/0?m...2F232863227477
In my opinion for you I would recommend considering the later cross-flow radiator and an aftermarket parallel flow condenser (the condenser would be considerably thinner than the factory one). This would greatly increase cooling capacity, and you could use a factory style aftermarket replacement.
I will however be able to give more feedback on this after my 450 mile drive home later this week!
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