Dear Ray;
I don't recall that head conversion for Chrysler 'flathead' 6 engines.
Arden had a set for Ford V-8 engines that were used a lot in Europe on trucks/commercial engines and here on Hot Rods. Hard to say.
The turbine engine Chrysler developed (50s & 60s) didn't like leaded gas. Back then "white gas" was the ONLY unleaded around and was special, for Coleman stoves and some torching applications etc.
Perhaps "today's the day" to bring it back. It would work great with today's multi speed transmissions, liter weight bodies and a mixture of bio-fuel & unleaded.
Happy trails.
