MC-1 MC-2 - Block any difference?

[Ben Swann]

Before I get too deep into my Ur Quattro engine build I am doing some sanity checks, and trying to combine the best of what I have.

Is there any difference between an MC-1 and MC-2 block other than the crank, rods and pistons.  I would like to use the MC-2 setup, but the MC-1 block I have is a litle closer to prepping for rebuild.  Can I just take the pistons and crank and install them in the MC-2 block.  I'll be doing the works on whichever block I use - new seals, bearing, rings etc.

Any serious reasons not to use MC-2 over an MC-1?  I know the compression is a little higher.   I will likely not not be using the fuel injection system from either, so I am asking with regard to issues of compression, etc.  Head, etc. being used I anticipate will flow way better than stock, and I should be able to force as much  fuel and air as I want.   What are the Tradeoffs between the two. espcially if the issues of fuel injection systems are disregarded?

Ben