I'd run that un-silenced 69 air cleaner without a second thought... I have a 70 340 air cleaner on my 70 but I bought it in the 90's for $25... No chance I'd pay todays asking price...
BTW I've used the wrinkle finish paint dozens of times... I've had varying results, and never perfect... Sometimes good, never perfect....
A buddy recently had a couple air cleaners powder coated.... They are beautiful...
So I just spent three hours blasting three air cleaners before dropping them off for powder coating.... When I get them back maybe I'll post pictures.....