Has any body changed bolt pattern from 5by 5 to 5 by 5.5 using spacers. I was wondering if thids would be a good idea such in case I go to dana 60's or go for the hub conversion. Such wondering if this would put to much pressure on the bearings using 35 or 37 wheels.

 

no different than running wheel spacers. you will be fine using them but they won't help you out any with a hub conversion.