Correct on wheel spacers. They were 1". The trick was finding some with SAE threads. I should have the receipt somewhere. Will try to dig it out. Also, the lugs on the truck had to be slightly cut down. So if you dont want to do that, I would try a 1.25 spacer.
:edit: Quick search, i think this is the site I got them from.
http://www.wheel-spacers.com/6x55-6x...m-Hub-P53.aspx