ok these wheels are 17x7.5 they have a backspacing of about 5-3/8 backspacing and centerline is 4-1/4. so subtract the centerline from the backspacing and you get----1-1/8 that is about 28.5 mm. here is a link to a pic that has my same rims but in 18's on truck laying frame... tucks good...these should tuck in my truck like crazy....
most any gm wheel will tuck with the right size tire...are you bagged or just static? i have seen a few of our type of trucks with caddy, silverado, denali, etc and they tuck ok front and rear...
most are 17x7.5 with a 28-31-32 mm offset. some are 17x8 with the larger offset of 32.
check this site for build threads...you can see some different heights with different rims also...
http://www.maxd50scene.com/forums/pr...s-t592-60.html