I have a 71 T that I am rebuilding and putting in E p/c's and thinking of E cams. Is it necessary to switch to a 2.2 E distributor? I did some research and it seems the 2.2 T,E,S advance curves are the same. Is this correct? Since there are three different distributor numbers for the 3 cars, logic would say they are quite different. I know that the red line on the rotors is different. It's not a big deal to change the distributor, but I don't want the extra expense, if it will make little to no difference. Thanks for any info you have...Steve