Engine/ Trans Combo?

aj
why not the kb quench dome pistons if he is running stock heads
256 or 262 lunati Voodoo
or howards 711381-10 255 duration on the intake but 470 lift
or
711651-10
but check the torque curve to make sure there is plenty of "after shift" and low end for that 4 speed with no torque converter multiplication
I think howard must be at .008 would be about the same running duration as 260 voodoo

I was thinking that as well, but now there will be additional machining costs to optimize the fit. I would absolutely go with a step dome piston and the tight-Q design, keep the od box, and whatever rear-gear is in it (for now), but on a budget, I would have to slam it together without any decking or shaving, unless required, PLUS whatever it might take to fit those pistons into the chambers. It's a lil extra money,maybe, but the detonation resistance and the extra compression would be so worth it.
Unfortunately I don't see the KB 190s as having enough step to do the job in an open-chamber , leaving the KB 191s with .150 pop up on top of the .050 elevated Q-pad, meaning in the neighborhood of .100 is gonna need to come off them.
I guess you could use the KB 190s and shave the heads maybe .050 (remains to be measured).
But in either case; that will likely drive the Scr to over 10.5/1, I think. Meaning that nice torquey little fast-rate 262 is no longer gonna work.
10.5 with iron heads is gonna want an Ica up near 72 degrees. And that is looking like a 284 to 292 cam :( ,lol, which will never work with that od box, and his gearing. Ok well I couldn't make it work.