Here are my Dougs 375Y tri-y headers mounted. I have about an inch of clearance on the drivers side collector and maybe an 1/8 inch on the passenger side collector. I also had a set of Thorley headers on the car and they did the same thing. So I don't think I got 2 sets of incorrectly made headers, or maybe I do!

drivers side
https://netfiles.uiuc.edu/mwh/www/camaro/driverheader.jpg

passenger side
https://netfiles.uiuc.edu/mwh/www/camaro/passheader.jpg

Here are pics of my motor mounts. I don't remember where I got them, but they are reproduction 69 small block mounts. The stands are original GM.

drivers side
https://netfiles.uiuc.edu/mwh/www/camaro/drivermount.jpg

passenger side
https://netfiles.uiuc.edu/mwh/www/camaro/passmount.jpg

Do these look right? Any ideas what would cause my motor to have this kind of lean? Should I try a different set of mounts?

Thanks,
Marc

My Hooker Competition headers fit the same way. I have heard this complaint many times. I just "live with it."

Hmm, no pictures.

I have the Thorleys and they fit the exact same way. I have gm frame mounts and energy suspension engine mounts. I think I even beat on the passenger side a little to make more room. The Thorleys fit much better than the Hooker super comps that I had before...and my upper control arms beat the heck out of.