302 casting swirl port heads

HemiEd said
If it is a "Commando" engine, and still has those "pop up" domed pistons, I question whether there will be enough clearance with the 302 heads..

The little roller 318 I just put together had those 302 heads, and they are pretty closed.

looking at this old thread before thinking of purchasing these, Is there a clearence issue with the 10.5 :1 commando pistons? Never heard of this.