X-heads enough for 408 stroker?

Been checking threads on SB stroker builds which usually have aluminum heads. I have a bare 69 340 block 30 over and picked up a fresh set of stock 2.02 X-heads a while back cheap.

Planning for a future build down the road. Not sure I really need a 408 but since I will evently have to buy a rotating assy - why not.

Wondering how much work would be needed to flow sufficiently to make a 408 stroker worth it? Not a high build strip motor but a street combo 727 AT w/ 2500-2800 stall and 3.55-3.73.

Inputs please - thanks

They flow decent, though porting them would be best ...as well getting the port volume up for some more rpm if you wanna see say 500 and up type of hp