How much better is a B block than an A?

[brett4christ]

I've had my 3 Model A engines for a while, but haven't done anything with them yet. I have recently obtained a B block and counterweighted crankshaft. My intentions were to put the B crank in one of my A blocks, that is until I saw the difference in main journal diameters.


Now for the big question...


Is it better to machine an A block for the B crank, or clean up the B block and use my extra A stuff to finish it up?