Well worst case you can weld one up.....the one I had was done by Paul Savadin (RIP) who did Big Daddy's cranks....he said properly done the 440 block would break before you'd ever hurt one of his cranks.

WIZE

World's Quickest Diahatsu Rocky (??) 414" Stroker Small block Mopar Powered. 10.84 @ 123...and gettin' quicker!

https://www.youtube.com/watch?v=-mWzLma3YGI

In Car:

https://www.youtube.com/watch?v=PjXcf95e6v0