Heads from all the recent generation of inline sixes will interchange. The 194 has smaller valves, I believe, but the 230/250/292 heads are pretty much clones of each other. Just stay away from the latest-production ones with the integral intake manifold. Those things suck line a Hoover upright vacuum cleaner, and they're prone to cracking, IIRC.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!