Stroker Performance Review

That build is damn close spec wise to mine. Except my Howard's cam is a solid roller, but really close spec wise.
And I'm running a 904 with manual valve body. 4500 converter from dynamic.
So far, this combo has given 11.3s @119.55 at 7,000+DA.
I would venture to say a proper converter would wake that sucker up quite a bit.

Edit..
It probably wouldn't hurt to get more seat time and do some tuning before any hard parts get changed. Find out where it's really happy to shift. Start low and work up.
Mess with suspension, simple tweaks can add up.