Thanks to all for the input. I guess I'll see what the local muffler shop will charge. The front pipe can be returned to the Autozone. The tail pipe was ordered from RockAuto, so I'll need to pay shipping to return it.

Meanwhile, for your entertainment, here's what I currently have. I saved the old rusted exhaust pipe that was on this engine when I pulled it from the donor truck. I have my 1965 C10 backed into the garage. By having it backed in, I have better lighting and more room to work. To avoid filling the garage with exhaust, I pie cut and welded the exhaust so it points forward to vent outside the garage. Looks weird. I tell the neighbor kids it's a rocket launcher. grin

I know it's a hack job but it keeps the exhaust out of the garage!