OEM Firestone air springs are no longer available and the aftermarket oem springs don't get a lot of positive recommendations. Mark Grueninger made a set of adapters to use a current Firestone 9294 spring. His post is here.
http://www.gmcmhphotos.com/photos/g5827-new-airbag-system.html
Thanks to Mark I set out to make a set like his.
From Ebay I got steel discs for $10 each and combined shipping of $16.
http://www.ebay.com/itm/131771912033?_trksid=p2060353.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT
I already had a section of 3x4x12 rectangle tube with 1/4 wall to use for standoffs.
Milling a 1/4" over 6" taper on a standoff.
Offset the spring mount to bogey 1/2" to clear the wheel well. Spring maximum OD specs at 10.7" from Firestone's data sheet.
http://firestoneip.com/-/media/www/global/files/documents/W013589294.pdf
R&S Leafspring had the best price on the springs.
http://rsleafspring.com/search.aspx?find=W013589294
test fit all the way up
test fit all the way down
Painted and installed at normal ride height.
