Oil leaks can occur from a number of sources,but starting from the top,run your finger (1) Back of valley pan and around base of dizzy(2) Both valve covers,as oil can drip down and be slung anywhere (3)Check around oil sending unit,making sure filter is properly seated(4)Bottom of timing chain cover,at corner(s) where it contacts the front of the pan,and around oil pan/rear pan gasket,(5)and probably and most common, the infamous REAR MAIN SEAL.
Good luck,you'll get it.
P.S. HP? 315-330, b my guess.
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