Decided on Rusto Satin for the dash + cluster and sprayed. Tried out several rattle can choices, but liked the finish and went with it.
Still assembling cluster. Got a 3315 Autometer fuel gauge to match my Mopar sender off eBay for $5 + shipping! So in it goes, no more 5volt limiter, other gauges are modded Sunpro mechanicals - except volts of course. This is a cheap solution that fits in the pod 71-77 Dodge bVan.