How street able are these 340 stroker motors?

IMO a 430 hp stroker is generally quite a bit more streetable than a 430 hp 340. It's real easy to get 425-450 hp out of a 416. I had a 360 in my Cuda at first and I'd estimate it was doing right about 375 hp. Built a 408 (360 based stroker) with basically the same size cam, but a solid lifter version, and I bet it's doing every bit of 425 hp and has gobs more torque. Idles better than the 360 too. The much greater torque is a big benefit cause it doesn't need as low gears as a stock stroke engine does and that leads to a much more fun car to drive on the street. Mine takes off a lot harder with the 408 and 3.55 gears than the old 360 did with 4:10 gears and I can actually run 70 down the hwy now with little effort. Gets better fuel mileage too. Last weekend we went down the river road for about 120 miles. Several towns in between and we stopped a couple times. Even went for a 10+ mile scenic drive through Piere state park which isn't good for gas mileage and it still got 15.9 mpg and that's with a 750 double pumper (didn't tickle it much though). If you think about it stroking a small block is kinda like your converting it to big block size, yet it's still in the small/lighter weight package. Good heads are real important cause it needs good lungs and you've got that with W2's. I've seen X heads used on strokers and even prepped good they restrict the upper rpm's quite a bit. Same goes for the exhaust, gotta let the air out. I'd sell the X heads and 340 manifolds and buy a nice set of TTI's or Doug's headers if it were mine. Lots easier to work around than Hooker style headers. Get a custom ground cam for it to match the combination and it'll really come to life. I've had good results running Racer Brown cams. Also used a Bullet cam once in a 416 I built for a buddy and it runs fantastic. If you can swing a roller cam that's a great upgrade, if not a solid F/T is real close in power