Flyfish's car and yours both look to have pretty good clearance in terms of how low the pan hangs..of course, the concern is bumps and suspension compressing.
I am not sure if the TTi's will be lower then the pan...I am like Mr. P, I like to use the headers to shield oil pan that way they are hit first and not a critical area like the oil pan instead.
Dustin, if you could take pictures of yours or measure tonight I would GREATLY appreciate it!
John, the canton in your duster, is that a center sump pan? Have a part # handy?