a link that was here a while back about puting a 440 crank into a B block.

I don't know which post you want the link to but you have to turn the mains down and trim several of the counter balancer weights on the crank to clearthe low deck block. I like to have the rod journals offset ground to BB Chevy rod sizes and increase the stroke to 3.91 also at the smae time that the crank is at the crankshaft shop

There's a pretty good one at ARengineering.com

Getting the crank in is actually pretty easy though. Turn the mains down to B engine size, cut the counterweights to
7 and 1/4 inch diameter, and it drops right in.