Well, I bit the bullet and placed my order.....

You'll want the 1 7/8" header from TTi. It is 340BE. Us the B/E body header and not the A-body header.

You could also ask some drag racers with motor plates what they use for headers.

Bria and Fred will tell you 1 7/8" is the way to go. Did they tell you a date on it's completion?