hey guys i have an 89 bird with a 305 tbi. i am going to slowly switch to carb and put a bigger cam in. i don't have all the money to do this at once so i am wondering if i can do it is 2 steps to get it goin. this is my plan- i am going to buy the mallory 3-port regulator and a fuel press. guage, then i am going to buy an MSD6A ignition box . would i have any probs doin this? also with the regulator i know i run one line from the tank into it then one out to the TBI but wuts the other port for? also with the MSD box will that hook right up noo big deal? and finally will my car work with all this done? thanks