Need jetting help!

i've just bolted an Edelbrock 1411-750CFM with electric choke onto the original intake of my 1969 "N" code 330 H.P. 383. The motor is stock, with about 80,000 miles on it, compression of 145 all around, and has all its oil changes (clean inside). What i'd like to know is what internal changes, if any, that i should make (jetting, metering rods, springs etc.) and what i should expect for horsepower increase. Thanks Gerry