A couple things after reading 72nblu's post, which is phenomenal info.
Always error on the side of too much back spacing you can always use spacers. You can't add backspacing.
A 1/2 inch to springs is tight, but ok. Mine have scrubbed there a little. But a 1/2 on both sides is tight. In my opinion when ordering wheels and tires, too tight. you should also know that the inner fender flare inboard above the lip.
take your ride final ride height into consideration when taking your measurements.
