Wow! Looking good. You aren't messing around with that thing. Do you think it will be on the street come spring? Is the car bare metal? If so, check out Slick Sand(Oreilly's) for primer. It is an etching and filler primer. Put it on, block it and then put some urethane over it for final blocking. It's what my neighbor and a bunch of resto shops around here are using. It's a about $80 for a gallon w/ hardener and a quart of reducer(you barely need any).
I will have to post up some pics of mine. Body work is about done. A friend and I have been making real good progress lately. Once I have everything primed I need to take the dummy subframe off and paint the shell. Then spray the bottom with truck bedliner. I am hoping to have some color on it by the ned of the year, but it probably won't, LOL.