To Stroke or not to Stroke?

Not hard to do in any size really. Just use the right parts and do good work (which I think you're already doing). If it's being built to sell, a 500+hp 340 is not going to be an easy sell. More marketable bigger, and 4" or more. Easier to mate with a street car. Otherwise it's "you want $x,*** for a 340? That's crazy!"