I finally got my the head on my '93 960 installed. I put the cams back the way they came out and installed the cam cover (thanks for the C-clamp and hard wood rig). I lined up the crank and cam and installed the timing belt. When I rotated it by hand, I found that after a while (before one full revolution) the crank will stop and not move due to piston and valve contact. I took the belt off and tried different combination of cam and crank movement until I found one where if all 3 were aligned and timing belt installed, engine could be manually rotated without interference. I rotated it about 3 times and it still lined up. So I released tensioner and called it done. After adding sparkplugs, anti-freeze and battery, I tried cranking the car but it spins and won't run. It cranks and sounds like it wants to start and run, but the battery will get tired after so much cranking. I swapped out battery and cranked some more, but it kept acting like it wants to start. I went and bought 4 gallons of 93 octane fuel and added it to the 3 or so gallon in the tank. I was worried that maybe the fuel in the tank is old from the car not being cranked in many months. I cranked some more but it kept acting like it wants to catch on and run. I went out and bought 6 sparkplugs for the car (Champion) and swaped out the Bosch platinum that was in there. I cranked and cranked, but it still won't run.

Is it possible for both cams and crank pully to be line up and still be out of timing? I would expect that if it is lined up and there is no interference, then the timing must be ok? What would you suggest for me to do to help me hear this car run, after 3 months ownersship.