Stroker Build... maybe

You can just run a smaller rod end. Chevy or even honda size. I would go to Molnar Industries or K1 or Ohio crankshaft. See what kits would fit the best. I would go more stroke and leave the walls as thick as possible. Then when you have 422 or 434 or 444 just say its 426. I tell people my 410 is a 340.