Thanks stu and streets for your input. What would be the best case scenario, in terms of $$$$$$ and ease of fix. I actually took the head off the engine after I received the engine because of the missing oil galley plug. I cleaned everything up well afterward and did everything by the book. Could any of this be my fault? I seem to think not because when it comes to my toys I'm pretty thoughraul- Idon't think I spelled that right.....Anyway does anybody else have anything else to say. I also would like to know how you get 425HP out this combo...

400 chevy engine - racing performance
block----------------------early 400 bored .040
crank----------------------new 3.75 stroke stock 400
rods-----------------------stock chevy 400 conditioned
pistons-------------------speed pro forged .040
rings-----------------------hastings moly .040
bearings-----------------clevite 77 .std
gaskets------------------fel- pro
bolts----------------------arp fasteners
camshaft----------------PBM/crane performance .292/.512 flat
tappet
lifters----------------------hydraulic
timing chain------------cloyes double roller
pushrods----------------stock
rockers-------------------stock
oil pump-----------------melling chevy m-55hv
heads---------------------stock reconditioned ported
valves---------------------2.02 stainless
timing cover------------stock chevy
oil pan--------------------stock chevy
valve covers-------------stock
damper-------------------stock