I love strokers, small blocks that think they are big blocks. Do you have good heads? My 408 had a pretty decent set of ported Edelbrocks and was fastest being shifted at 6400-6600. Yes, it would turn more rpms but there was no reason to do it. As far as cranks go, I'd be looking at forged.

You are at a place where a stroker makes sense, you need pistons, rods and the crank you have needs work. I'd go for it, even if later on I had to upgrade the heads.