How does this 360 build sound?

The Doug headers are similar in performance to the regular header except it actually fits. It's a 1-5/8 tube into a 3 inch colector

The TTI's step up from a 1-5/8 tube to a 1-3/4 tube and a 3 inch collector IIRC. There is or I should say, can be a slight advantage to a step header.

Con Rods can be expensive to rework. My last set was a freebie to me and only needed minor work. So they get the go ahead. Otherwise, it would probably be a set of Eagle or Scat rods. For there cost and OOTB matched weight, it really can not be beat unless your doing your own work on the OE Con Rods.

IMO, a new OE feul pump is all you'll need. A HI-PO pump can be overkill so watch which one you get. Carter makes a couple pumps from a street pump upgrade unit that requires no regulators to race pumps that cn overwelm a carb and need regulators and return lines etc......
If you go up in line size to a 3/8th line, get the sending unit with the 3/8th pick up and IMO a new set of stainless steel line @ 3/8th's. You can get the fuel line from "Finelines.com" and other places.

IMO, the cam size is big for an automatic trans, doable, but a little big and the 3.55's do not help alot.

What size tire are you going to end up running?

Is another torque converter with a higher stall in the plans or OK to change out for the set up?

Are you asking my opinion on a cam?