get an 02 sensor and a hand held gauge, summit and jegs both sell them. weld a 02 sensor bung in ither the headder collector or close to the headder collector in the pipe. plug the hand held gauge in some how get it into the passanger compartment and take a drive. play w/ the jets until under normal driving conditions it runs close to 14.7, a little leaner wouldn't hurt as long as it didn't ping. make shure that it goes rich and not lean, when you mash the gas.

I put an in dash gauge in my Falcon due to tuning the 2300 holley under boost, will be hard to get right. and a lean run unnoticed could mean a burnt up pistion