I guess this is super secret squirrel stuff cause it seems anybody with real experience with a screamer isnt sharing and I respect that. I guess I may have to go the sb2 route or the ls route.
Ouch.
I am actually really interested in the responses you do get. I went the stroker route on my 340. I used the lightest stuff I could come up with on my budget. The heads were worked within an inch of their life. The current cam is a solid flat tappet cam using a couple of Ford circle track lobe profiles. It has a torque curve that looks more like a table top. I'm running a Strip Dominator intake and currently playing with a Holley 780 carb. It spins up pretty quick, but it's pretty much done around 6 to 6500.
Hence, I would think the shorter stroke would spin up wicked quick. Add in more cam and a better flowing top end, you should be within spittin distance of your goal and still making reasonable power. Just make sure you have a good oiling system and really look at your valvetrain stability at that rpm.