[Gunner]

I believe that the only special steps for a 347 stroker are that some relief notches have to be cut in the pan skirt. Mine has little half-moons in a few places to clear the rod bolts. Everything else is (or should be) standard balancing, boring, fitting etc. that any competent engine machinist should be able to do.

As blykins has partly said, though, punching the engine out to 347 cubes with no other changes won't gain you very much. You need better-breathing heads (and intake, and often exhaust) and a cam optimized for the new overall setup, to get noticeable improvements from the work.

If you're doing the 347 conversion as an upgrade to a regular rebuild, that's a good start, because the bottom end of an engine is the hardest part to upgrade. But you should consider some better heads as your next step, to get more out of your investment.

If you're going to be running the engine very hard, or at higher RPMs a lot, you might consider a bearing girdle as well. This will stiffen the block structure and contribute greatly to engine longevity with the long, thrashing throw of the 347 crank. Girdles are pretty much a bolt-on deal if they come with the longer cap studs or bolts. Some relief work might need to be done if the girdle doesn't clear the larger crank, but most I've seen are set up for stroker motors already.