Riding home in the rain did this

to my

B18A1 block:
(thanks to jani for link)
See those 2 big holes??
What I wanna know is what I can to do to replace it? will any b-series block fit my block? I know I gotta pull it out and do an obvious rebuild...
will part from an automatic b-series interchange with a manual... yea I'M A NOOB. But I got lots of time on my hands... And friends to help! LoL!
Can anyone give me a ballpark estimate on how much ill spend and information for A NOOB 2 Know like parts I should look into buying for the repair (stock and performance), or if you know where i can get a good deal on a B-series motor, I would appreciate it.
Im in Panama City, FLORIDA!
Like I said any input would help... THANKS IN ADVANCE!!!