the ol stock crank

The hole for the pin can be welded and machined for the desired stroke. Falicon can do this. Another option is to make the pin off set. The best way is to buy a stroked crank if they make one.
 
Just buy one. You can change it, but I'd much rather buy a new cranked forged from one solid piece......not to mention, a good after market stroker crank is stronger than a stock crank which is always a nice thing to have on your side.
 
The hole for the pin can be welded and machined for the desired stroke. Falicon can do this. Another option is to make the pin off set. The best way is to buy a stroked crank if they make one.

^^Very true. It's just quite a bit more expensive to stroke a stock crank than to buy and install a 'drop-in' stroker crank. Not trying to jack this thread, but I've got a question. Just how 'good' are the aftermarket stroker cranks in general, with reference to trueness out-of-the-box? I mean, I'd have one checked before installing it anyways, but how far out-of-true do they tend to come?
 
^^Very true. It's just quite a bit more expensive to stroke a stock crank than to buy and install a 'drop-in' stroker crank. Not trying to jack this thread, but I've got a question. Just how 'good' are the aftermarket stroker cranks in general, with reference to trueness out-of-the-box? I mean, I'd have one checked before installing it anyways, but how far out-of-true do they tend to come?

depends on the manufacturer and some are right on while others are out a few thousandths