I would do it in a heartbeat.......
However your OEM rims are 6 inches wide and the LTs call for 7 inch. Although this is not a problem for me, it may be a problem for others.
The way around it is to sell you current rim and tire assemblies on craigslist and get new rims. You can walk away from the whole Towmax and ST tire problem forever, for about $700 net out of pocket.
I sold my Towmax tire and rim assemblies for $800.