I wonder if the 16.5 vs. 16 puts the rim at a worse position for hitting the tie rod?
Dodge 8 Lug wheels from the 80s and very early 90s (not sure what year, exactly) will also work. I believe they are 16 x 6.
Also check out this
thread. The wheels referenced in the first post (17-153) can be purchased several places. Here's a
PDF with specs for them. You may want to look for another option other than the 17-153 if you are going to max out the 3600's payload on a regular basis. (Note: I have not tried these wheels myself.)