Engine Centerline - Dimension

I have spent an excessive amount of time here on the forums researching header installs - the minor issue I have is acceptable, would have been a little more painfull with the TTi's since they would have cost about 500 more, and since my dimensions aren't perfect they wouldn't have any sympathy for me. something else I now know about the car
$500 more??? My TTI's were $700 and Doug's were $600 at the time. Has TTI gone up that much? BTW: My TTI's fit perfect. I love the slip tube on #7. Sure made getting the drivers side header in easier. Until you try them don't assume their gonna fit just like others. I've learned that with numerous things, not just headers