some good info- http://jimsgarage.wordpress.com/2006/09/14/the-grose-jet/ http://jimsgarage.wordpress.com/2006/11/30/grose-jet-revisited/ jon
GREAT Site ! ...Like I said : two balls does the trick . There used to be places that sold these , I don't recall where I saw the ads but I bet you'll find it in Hemming's Motor News . Go back and read bunches of cool stuff on that site , includsing a nice writeup on 6 cylinder engines... He kinda goofs tho' as he says the Pontiac OHC InLine 6 banger was a great engine when in fact , they dropped like flies . IIRC Jeep also diddled with an OHC InLine 6 banger in the late 1960's , also a dog that sent many FC series Jeeps to early junkyard homes .