1. If you already have the materials it should be cheaper as the shop does not have to buy the materials to do the job.
2. Remember that the cost of paint varies with the color you use with Red's being the highest cost. That is the way it is around here anyway.
3.Even though the part you got from Mar-K is new there could be improfections that needs to be taken care of. If you want it straight they have to block it out to make sure there isn't any waves on the metal while being made. There are so many variables when painting a truck or car and the shop may be bidding high to cover unexpected costs. Prepration is what a great paint job is all about. Now if you are going to use this truck for a work truck or daily driver there companys like Macco or Earl Shibe that will paint a truck cheap but one caution you get what you pay for and yes I agree there's some companies who think their POO does not stink and think they can get what ever price want. Then on the flip side of the coin there companys who really deserve their price they command. My .02 cents here.
62Blue
Don

62Blue
62Chevy in progress
You've never been lost until you've been lost at Mach3" Paul F Crichmore (Test Pilot)