large port commando heads

you sure know these heads!

but will they realy be that much too big on a 340 with about 12.5:1 compression and a solidrollercam with .650 lift and 268/272 degrees of duration at .050 with a holley strip dominator intake manifold and of course a bottomend that is as bulletprof as a stockblock and crank can bee?
will these heads suport enough power to go some mid 10seconds at the track on a stroker engine? i gues a stockstroke 340 is to small for that
yes its a streetcar but its a very very agresiv engine already i know that and i am used to driving around with a rough idling smallblock with poor low rpm power but i know i forget all about that poor low rpm as soon as the engines screaming..
BTW streetcars over here in sweden are known to push the limmits alitle to the extremes for some reason ;)

thanks alot in advance