Glenn,

Greetings from the NORTH St. Paul 'burbs! I switched to a 15 inch tire to stay more narrow and cost effective. Sams Club (35e) had an 85 width 16 that tempted me pretty hard. It was narrower than other 16's available, which is a concern if you don't want to rub on the body or switch rims. They are designed for the modern dually trucks but could work on the chevy. The height seemed close to a 6-50 and would be better on the highway gearing than a lower to mid 15 like I got. They're not cheap though, at 75-85 each. If you do want to switch to 15's I've got a local tip to consider.

How far are you on yours? I'd be gald to have local guys to swap notes with...