Tires: replacing 16.5 dually wheels with 16, dually wheels, 16 wheels

Question
I want to replace my 16.5" dually wheels with 16" wheels on a 79 chevy 30 series van/motorhome. I have no fenderwell clearance problems my only question is what size can I go up to as far as width for the rear dually set up. I have a set of 245-76-r16 that I would like to use

Answer
Tommy,

I address this here:

http://www.geocities.com/barrystiretech/165tires.html

However, since I don't know the dimensions of the rear wheel housing, I can't tell you for sure if there is enough clearance.  But the link should be a good guideline to help in determining whether you have enough clearance or not.