MorePar, Man those headers look good! I made some for a big block install (!!) and ended up using Pro-Parts semi fenderwell headers, just had to reroute 2 tubes but it fit like a glove. Making your own is easy if you got all the bends and a good chop saw. They cost so much to make becasue there is a huge labor bill attached as each piece has to be thought out, measured, cut and welded. Lots of hours at $50-70+ an hour or whatever the shop charges. My design: I think the #1 has to come straight down and under the steering box. #3 has to come out up and straight back over the 5 tube like many 67 and up designs. 5 and 7 are generic down and back with the #3 down there somewhere. Passenger side is off the shelf with a shorty filter or relocate it up to the fender and run an anti drain back filter, those 90's are a PITA to change as you cant even get the filter out past the headers.