I'm not sure why people think that Bogart specs are some big secret. Like Mike said, there are plenty out there to measure. I sent an e-mail directly to Bogart several months ago asking about the specs on the Bogart wheels pictured in this link:
http://www.camaro5.com/forums/showthread.php?t=128033
I was told by Ricky at Bogart: "These would be a 17x10 with a 6 3/4 backspace @ $697 each. The fronts are 17x5 with a 2 1/4 @ $636 each (just in case)....".
So, I guess I let the big secret cat out of the bag....oh well!!!!