a body headers

Riff Raff said
….I'm running tall skinny Pro Trac's up front...…..

What tire diameter? Street driven? My 165r-15's (approx. 25.50" dia,) rub more than one Hooker tube on the right turn drive way entrances and such.

OP, when/if you go the TTI site, make sure you read all the footnotes they provide for a particular header set.
http://ttiexhaust.com/MoparClassics-Headers/Subcategory/ccBigBlock-RB.htm

Deals show up here on occasion. One recently on a new set of Schumacher Tri's.
'67-72 A-Body Products

There is also info at ……
Tech Index