I'm trying to help a guy figure out what standard flywheel will fit on a 1980 231 V6 he is using to replace a 1960's 225. Anybody have one or know where to look? Will a stickshift flywheel from a 340 or 350 Buick work?

Dave

I would imagine that you would have to use one from a mid-80s grand national or the mid-late 90s firebird/camaro. Those are the only vehicles i know of with stickshift 3.8s
You'll have to watch out for how the engine and flywheels are balenced though!