Yep, just by stroking the crank a little, getting different pistons and rods in an Olds 350, you can get a 375 with just a little boring. It's only 25cu in, but the dynamics of the motor are alot better, Typically good for an average of about 50-75hp.
Now, if you use a 350DX small blocked Olds, you could (at very best) stroke it out to a 440cu in It's not common that you get a block good enough to go that far with, the most common is low 400's.