Amen to that. QA1 actually did some research on this and there was up to a 1/2" of variance on many cars. Gives the common guy a fighting chance to get this to bolt up.

1968 Pro-Touring Dodge Charger
*2011 Optima Ultimate Street Car Challenge Invitee
http://www.popularhotrodding.com/features/1203phr_1968_dodge_charger/index.html