[blykins]

You don't need forged, and scat doesn't make a steel 428 crank anyway.

I personally would go with a 4.250, and yes, when you add 30-60 cubes, the cam selection will change. The cam you have will be much milder with a larger engine. If that's something you can deal with, then no need to change. Also no problem with mixing manufacturers if you do change.

Save the $500 that you would spend on a steel crank, get a cast 4.25 stroke, and buy a new set of rods and piston rings with the money.