your opinions on stroker crank or grinding a factory

I agree with Crackedback. I'm in the process of building that very engine. I decided that I didnt want to bother with used rods so if I was going to buy new ones I figured why not go for the chebby rod bearing size, offset grind the crank and get some more inches too.
Just be sure to get the crank magnafluxed just to be sure you're starting out with a good part.

Ted