Thanks Chris. That's the exact spot I would have considered drilling/tapping if I were to do it myself, but I don't have a drill press, nor do I have any experience drilling/tapping anything (not that I doubt my abilities). My dad was telling me about his experience working on Mustangs back in the 60s/70s and he put a little fear in me as far as drilling into cast iron, mating different types of metals, expansion/contraction during heat cycles, only getting one chance to tap things properly, the risk of cross-threading, breaking a tap and having to drill it out, being without a car for a period of time - pretty much anything and everything that could possibly go wrong (hey, that's what dads are for, right?)... which is what got me thinking about the GS parts to avoid all of that potential trouble.
Thanks for the info about the DP bung - I had a suspicion that was the case, but I didn't look into it. Thanks for saving me some time. I knew the temp readings would be lower since it's several feet further away from the heat source, but I didn't realize it would be around several hundred degrees +/- (that makes sense though).
For now, I'll just hook up everything else for all the gauges and have an inactive EGT gauge with the sender unit/wire ziptied neatly in a coil somewhere in the engine bay near the driver's side exh-mani until I can get the GS pieces and do it properly.
As for wrapping/spraying over the flex-section of the GS crosspipe, is that an issue as far as limiting flexibility or does the wrap flex too? Even after being sprayed? I imagine the flex section would move around a bit as the engine vibrates during normal (and abnormal) driving similar to the flex section in the cat back... I wouldn't want to stiffen that up too much unnecessarily. Do you wrap everything except the flex section or is it ok to cover that up?
I've never wrapped/sprayed anything before, but that sounds like it would be doable given my attention to detail when it comes to those types of things. Obviously, the best option is probably to get the GS pieces ceramic coated and then wrap/spray them myself. I'm not too keen on the idea of reusing the stock heat shields if I can help it. I just don't like the look - not that anybody can see under there anyway. It's a mental thing.
I guess it's time to man up and drop another several hundred bucks