327 block same as 350??

[Nobody_u_know]

My question is whats the difference in the 327 to the 350? I know the obvious things such as the rotating assembly (crank, rod, piston ect...) But the block it self? I know they have a early 60's small journal and later came the large journal around 67 but does that make a difference in the block. Can I put a 350 crank in my original 327 motor and make a 350 out of it? I pulled apart my lower end today and found a crank that sure seen better days. Finding a 327 crank is a job in itself and the $$ makes me wonder why not turn it into a 350 if possible while I have to replace most of the rotating assembly any ways.