while replacing the timing gear for the IP, i managed to jump the chain a few teeth on the crank! everything was going well and then i went to torque down the reverse threaded bolt for the IP gear and i heard the awful noise of the chain hopping off the crank. i forgot to re install the tensioner! i have no idea how many teeth it jumped either. with 15 degrees ATDC showing on the pointer, the IP locking tool would not seat. how often are the crank indicators off? i feel awful now and am hoping i didn't completely screw this up. i don't know what to do next? is it as easy as lining marks on the cam and crank up, getting the locking tool in the IP and getting the chain on the sprockets or am i screwed because the crank position pointer may be off?

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83 300CD- sanden, dual p/f condensers, 160a alternator, ect
91 300TD- 722.6, #22 head, 3.5L IP, w140 manifolds, ect