Looking at Dougs B body headers HELP!

Well long story short had a friend back out on selling me his TTi big block headers - SO I need to buy headers by tomorrow night to get any further on my car, looking at Doug's short deck big block B body headers (link below)

These or Summit's as they're the same as Hedman's but with a 5/16" flange instead of the actual Hedman's 1/4"

Schumacker, and TTi's brand new are not affordable

http://www.summitracing.com/parts/dou-d451-r/overview/year/1968/make/dodge/model/charger
I went almost this same exact route, and got burned. I measured and measured, but when sucked up, they hit the steering box. Don't cut corners, your going to buy the TTI's anyway.