Is it rare Poly 318?

High end Dodges and Desotos got the hemis. Desoto Firesweeps (like mine) never got the hemi (They were basically a dodge with desoto fins) Chryslers got 'em and no plymouths.

Thanks for the info on the Desotos as I couldn't remember. I love the '50s era Chryslers. As Rob pointed out it was like Baskin Robbins, before the corporate world came down and said "shared engines." Ask a kid these days what a Desoto was and you get a blank stare. Or even better yet, what's a Fargo?
Now, correct me if I'm wrong, but the 277 started life as a Plymouth only Poly that later morphed into the 318, correct?