Yes you can still use the blower, the hat will just bolt in place of the carb adapter.
If it's a drag car, then a mechanical system will be just fine, if you drive it on the street a bunch then mechanical is a real pain.
As far as the fuel system, it's a pretty simple deal, you will have a mechanical pump run off the engine, tank up front, higher than the pump but lower than the nozzles, a high speed bypass, idle check and some returns to the tank.
I started out learning by buying Hilborns book, reading and applying what I learned until I had my own system in place for determining a starting tune-up. Blower cars aren't too bad as long as you know what the blower produces in air flow.
Best bet would be to buy the system from enderle, they will take all of your information, flow the fuel system and set you up with a decent baseline tune-up.
I will no longer give a starting point to people, did it once only to find out the guy was using worn out junk he bought off ebay that didn't even come close to factory flow numbers so the engine was lean and burnt up. I ended up being the A-Hole that didn't what I was doing.