The only machine shop here in middle Tennessee that I know of willing to do that is run by a "retired" machinist two years older than me. He has a nicely-equipped shop behind his home, and he stays booked up at least six months in advance. He's almost 100 miles north of my place, up close to Kentucky. He also makes welded strokers for the big 2 cylinder John Deere tractor pullers in the antique class, ones that require slots to be cut in the block between the crankcase and the transmission housing to accommodate the 5/8" extra stroke.
Stroke changing used to be commonplace in the flathead Ford days when Dad was racing, and early Chevy 350's could be stroked to 3 9/16" by offset grinding to use the 2" diameter 283 rod journals.
Jerry
