Tubular Automotive Headers

Tubular Automotive seems to be the best header to grow into in regards to power potential, quality and fit? 72 Duster, manual brakes, manual steering, 727. Presently a very mild build but need room to grow to Trick Flow heads and a 235-240 duration cam @ .050 I'd rather just buy headers once.
They are dam good but you better give them a call, my buddy tried to get headers from them a few weeks ago and there is a tube shortage. They had no tubes to make 1 7/8 headers for the foreseeable future but maybe/hopefully thats changed. You can get the hedman hustlers as that's what he did but of course you have to cut holes.