Another newbie, but from New Hampshire

working on my pictures- will post some more soon. OK, so much for my pics...............open them if you like! they are from a 1969 issue titled the six most dangerous Darts!
Spent a day under the back half of the Dart yesterday (tail shaft seal and exhaust) and today under the front 1/2. Fixed a couple of oil and one exhaust leak. Tightened up the steering box and put new plugs in it. Put a timing light on it last night, but it was not clear what's going on with the timing. The engine # is 2468130 with an "LL" and mfg date of 4/27/67. Anyone want to chime in and enlighten me with the info? Not hearing back from the PO and would like to know a little bit more about this car. Think I'll be going for an 8 and 1/4 3.55 Sure Grip in my 2.73 open diff. 8 and 1/4 housing. Also would appreciate any advice on the proportioning valve for the brakes. The rear brakes are doing all the work.
Thanks in Advance, Bob Gale