There is a spec sheet posted over on A body forum that says the 270 heads are MW with a port opening of 2.630 x 1.340. So that might not be as big as some people make a MW opening, but I think it is close to what some of the smaller MW gaskets are.

Interesting thing is that the 270 head uses standard rocker arms. So no need to buy the 0.800 offset Indy rockers or the Victor offset rockers.

I'm planning to have the 270 heads on the dyno as soon as they ship. I don't know if Trick Flow is going to release an intake or not. If they don't then I guess I'll have to find a 400-2 Indy intake.