Installed a new M/C, doesn't work at all, what am I missing??

[old cool]

Buck, you never mentioned suspicion of your new MC. I'm going to assume that I'm not telling you anything new, but I've got to add a point or two. To rule out the master cyerrlinder as the problem, I would assume if you had someone push the pedal a few times, then hold it down, and then crack each line (separately) on each side of the master cylinder , you could see if it were pushing the fluid at each nut. If there is no fluid squirting at the nut, your prob is MC. If not MC, then you work your way down to the bleeders, again, having someone to press the pedal several times, then holding it and then cracking the bleeder. If your wheel cylinder (s) are not allowing the fluid to pass through, I would assume prob is malfunctioning at one or both WC. I'm sorry if this sounds insulting. But as you said it is not rocket science. And as the old high school science teacher said, test one variable at a time so you know what corrected the problem.
Looking down into a 67 style dual MC, there is a vent hole and a replenishing hole in each barrel. I dont know how your MC is built, but i would imagine the vent hole must be open for proper circulation. Please dont ask me how I know this.