Scott if you need any other supplies I can turn you on to some other companies
www.coneeng.com, Im building my own 4v turbo headers and system..lol FUN and Im a welding fool..lol
I did a HP kit on a 93 Cobra and on a stock K-member, stock 93 vert mounts I had NONE of those clearance issues, and I had to run custom 3/8" thick header adapter plates with the big ass port I have on the AFR225's. HP was going to make my headers for a wide bolt pattern but surprise that didnt happen. I finally got my parts when I threatened to fly out there with my NFL customers lawer...parts were on my porch in 3 days with a nice upgrade to a GT42 ball bearing 76mm (I was supposed to get a standard bushing unit)
Only place clearance was really tight was at the steering rack, before I wrapped it I melted a boot!
Otherwise you may want to check these guys out
www.cgfabrication.com prices are very reasonable and the quality is top notch.