I talked with TCI and they said the only headers they know of are Ultimate Headers which are pretty pricey and really just shorties anyway. They suggested I build a set on the truck so they'll fit. I did look up one of those header modeling kits (
https://www.trick-tools.com/Icengine...ling-Set-10448) but they're >$800 which is a lot with only a single set of headers in the que.
Anyone have long tube headers on an LS in a '47-'54? or maybe a used 1-7/8" header modeling kit?