Ok, I finally found the blasted receipt for those suckers....the part # at Summit is HED-65003. Also, they are 1 3/4" primaries, I forgot to answer that question before, sorry about that 1Faast. With the shorties that everyone is talking about you shouldn't have to do any mods to the truck to get them to fit, but these are full length and don't hang down below the frame, that's why all the fabrication and "notching" had to be done. Getting some that didn't hang down was what I wanted and these fit nicely as far as that goes. I have about a 6/8 drop and most other full headers would be sitting on the ground. The only real pain was making the crossmember and making sure the tranny mounts at the right angle. But I like the performance of the full length and with my setup I felt they were needed and worth the work. I guess it all just depends on what you want and what you feel should be put in there.
Ryan, let me know when you ready to put some in, I'll head that way and see if I can't give you a hand. I can bring the truck down there so we have something to go off of...
Take care,
Matt