Hi fellas! Well, I have hit a wall, and have no idea where to go from here. I have an 86 720 I have been working on. Great truck, have put TONS of work into her. Ran great, but did have some valve clatter around 4k. Well my parts truck had brand new heads on it, so I decide to swap, and you know it, the tensioner popped.
I have replaced the timing set before without any issues. This time, I decided to pull the motor, and clean it up, replace every gasket, retorque all the bolts and whatnot. I set TDC prior to removal. I lined up the colored links with the punch marks on the cam and crank sprocket as seen in the photo. Now it wont run for crap. It will only start with the choke on, "manual choke, weber carb" and runs at like 4k for 7-8 seconds, then dies. I moved the oil pump a tooth each direction, with no avail. Funny thing is, if I put the crank at TDC compression, my dizzy is pointing at #1, and my cam sprocket key is at 12 o'clock. I have even manually spun the crank, and all the valves appear to be operation correctly.
I'm half way back into the timing, but dont want to break the case, because then what do I do? You can see in the picture, I have everything lined up properly..... What gives???? Maybe someone didn't rebuild the head properly....? Thanks in advance guys.
http://i1109.photobucket.com/albums/h422/me5150/20140430_171210.jpeg