Hughes Big Mouth heads

Thats what I was told this morning.
I ordered the reg. Eddys with the CNC porting, but was thinking about switching my order to
the Big Mouth head.
The more I look at the data, the more I think this is the way to go.
Dave told me I could change my order, if done in a timely manner.

These are for a back-up engine, so time isn't a big factor.