Need help assembling my first motor

I just bought a 2.4T motor without a crank &
bearings, with an xtra set of 2.7 jugs & pistons. I have a few question to help get me started. this motor wil replace my 2.2t

-where can I buy used parts at good prices.
-one of the jugs is scored but the other ones are in good shape,can one be bored over or do I have to do them all? I think .010 to .020 will do it.
-will the bosh distributor fit my 2.2 for now.

thanks

There will be many more postings for your help but this will help me get started. I've done harley motors before but never one of these.