Holy Damnit!
I just measured the wheels and they're 16.5"! I thought they were 15".
Measuring the gap you showed in red is roughly 9-3/4"
Measuring from nub to nub is roughly 10"
The outer lip is 1" wide and 1-3/4" tall.
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If I've got anything up for grabs, it'll be here: 7-hole gauge cluster for a 67-72 p/u FREE (
link)
I can't check the forum daily. If I don't reply to you within 24 hours,
drop me a PM! I'm (hopefully) still alive and will reply faster to a PM.