Hi guys, I am new to the forum but not new to IDI's. I have 3. An 85 F250HD with the 6.9l, an 87 F350 crew cab, same engine and an 87 E350 Club Wagon, same engine. My question is one of dynamic timing. For 15 years now, all I've ever done is set 'em to the factory line on the gear cover/IP. Now...