dual quad nitrous !!?!!

Oh boy #-o
LOL , and back to the op's original question - If he stumbled into a boat load of $$ and could buy an edelbrock dual quad nitrous kit what are the hidden parts and considerations ?

You will need another fuel pump, regulator and all the line to hook it all up, a smaller fuel cell would be the best way to go, that way you can run good race fuel with the nitrous. A bottle warmer is a must if you want to keep any kind of useable pressure in the nitrous bottle. My first time out I did not have one, spent 30 minutes getting the bottle warmed up each pass. A blow off valve vented outside is also a good idea, I believe you need one at the track if the bottle is in drivers compartment. Not sure if a pressure gauge comes with your kit you are looking at. As far as timing goes, no cost way is to retard timing by hand, unless you have a programmable ignition box or can add a timing box, like MSD has. Also if your rpm at the stripe is already maxed out now, you will run out of gear on nitrous