Here is an update on how things ultimately shook out regarding the aftermarket replacement gauges. After working with the supplier to resolve the fitment issues, and receiving my modified gauge set back from them, I ultimately decided after all to stick with a working set of factory gauges I had on the shelf. This was a difficult decision, but ultimately it came down to deciding (for now) to trade the benefit of the improved accuracy and reliability of the replacement gauges for the significantly better (IMO) light pattern of the factory set. I've included a picture of the bench test comparisons below.
The intended redesign of the gauges that the tech at AMS Obsolete says they are committed to is not going to be something that will happen overnight. But I am all-in on installing new sets of them in both my cars when it does. Especially given that after everything they did to try to satisfy my concerns - and it is worth noting that all of this occurred almost a year after I originally purchased them - AMS graciously offered to take my set back for a FULL REFUND.
These guys are a class act and I cannot recommend them enough for quality products that they will stand behind.
Here are some links to their various websites.
One caveat is that you will always want to call them to place an order. Do not rely on what the websites say as to current stock status or availability.
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