So, I've been reading dozens of posts and still confused. I am finally getting ready to install the EZ 2.0 system, with the Dual Sync distributor. I've got the engine at TDC (used a piston stop and new timing tape on balancer), balancer is marked for 0 (have a timing tape that has 0-60 BTDC marks). New resistor plugs are in. Swapped my cam gear off the old MSD Pro Billet dizzy to the FAST dual sync. I've read the directions included with the dizzy and the EFI book, hoping for some clarification? First, I was going to go with the "1 degree" reference angle...is there any reason for me to use the 50 degree reference angle? I am not a "tuner", I just want the system to run good (is on my '73 K5 that is mostly used for off roading, some occasional street cruising - this is not a hot rod!) Or because I already have ability to easily identify the 50 BTDC mark, should I go that route now? SO, I have repeatedly seen people on here suggesting to roll the crank back to the 30 BTDC mark and THEN putting the dual sync in with rotor pointing at #1 on the cap? But the directions from FAST say to have engine at TDC, then put in distributor with rotor pointing in "general direction" of #1 cylinder...then turn housing counterclockwise until you get the LEDs to light up, etc. (and like others have asked, finding the "leading edge" of the crank signal...to me, that sounds like I'd want to lock it down at the spot JUST BEFORE the LED lights?) SO, which is it? The directions that come with the distributor are pretty lacking... I bought the engine off a fellow off roader who had just had it built, but babies came and he needed money! Basic specs are: 383 SBC, Trick Flow 195cc aluminum heads (Kenny Duttweiler), Edelbrock Performer RPM dual plane, 9.7:1 compression, comp cams 224/230 (I can get exact cam number if needed later), etc. Also, the old plugs were gapped at .040 when I got it, so I gapped the new resistor AC delco plugs at .040 also...is that ok? Thank you for any help!!!