Brodix B1BA heads...

I agree heads can be carved on. The MC just plain isnt a good head, carved on or not.
My old W5 heads went 140 mph in a 3200 pound car on gas and 002/003 leafs. Faster than when i had the car.... lol.... but new owner went more agressive on camshaft and compression and got it to 3200 from the 3350 when i raced it.
The dyno said 708 on the 422 motor with W5 heads. The Mph at the track backed it up.

Before trying to make use of that MC head i would get a set of well prepped indy oval port heads, they make very good power properly done. the 230 cc ones