Spend your money on a Pertronix conversion and you wont need the dwell/tach meter.
What you want old school analogue? I have a bunch for sale $25 and up depending on what you want really. There is a DMM one I really like that I have on flea bay for around 30 shipped. For teaching there is nothing like a analog to show visually what adjustments do not just a number.
I will Tach dwell? I will post the pics here in the am. Been getting them for next year at Carlsisle and fixing them as needed getting some cool stuff in like this set. This is for that garage!
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Here you go.
I have a few of the old sun ones restored buy they go 100 and up
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Ahh, sorry, reading is hard. I'll PM you laterThose are 25 (sears) and up the sun ones get expensive not shown.