HELP!!!

i got a crazy oil leak and i can't really determine where its coming from. the leak seems like its just streaming off the crank...do the crank seals usually go bad on these trucks?

i was wondering if anyone had an engine diagram cuz it looks like its coming from either the crank or the gasket thats right near that but i have no idea what that gasket is. please advise!!!
thanks

crank seals are notorious. i was leaking a quart every 5 days!! I replaced crank and cam seals when i did water pump and timing belt. Good Luck

are the cam and cranks seals on a b2200 the same?

ordered one of each from rockauto, got 2 of the same part #...
rechecked site:

some brands, same part number for either cam or crank seal,
other brands, 2 different part numbers...

Id rather know i have all the right parts before i tear into the timing belt...

thanks