I just posted on another thread about the Dekagram then saw this rather long thread......
16x8 is the absolute best all around wheel size for this car and that is one hell of a good wheel in price, quality and style as well as very low weight and flow formed so strong enough for any kind of racing, etc....
Not sure if said here or elsewhere but DO NOT have wheels powered coated as it weakens them especially if heat treated as some wheels are and flow formed wheels are made from cast wheels with heated and rolled rims.
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If these where available in 2014 I would not of been the first to do the 4x100 bolt pattern change, the first and only one to run 9" wide wheels under rolled and pulled fenders, the first and only one to do a rear camber change nor built front and rear BBK's to fit under 15's, a hell of a lot of work and money invested in one off projects.
Those just wanting the best overall setup for the time and money and performance value need look no further
Only thing I would consider is running +35's instead of the +40s though technically +40 is more appropriate and might even be a bit faster do to scrub radius issues.
I have had 7 or 8 sets of wheels and tires for this car and hundreds over the last 50 years on modded cars all the way up to full out $100k race car builds so have a pretty good idea of what works and does not work and why the lowest weight proper fitting quality wheel is the way to go for real performance, better ride and less wear on the chassis
Rick