I think if you do a search here you will find some lively discussions about 194 heads. Most here stay out of the 194 head "discussions".
It is true that bolting a 194 head on a 250 will up the compression but when you start modifying them with bigger valves and then unshrouding those larger valves, so they will flow, the chamber becomes as large as the 250-292 heads. As a cheap quickie junk yard hop up dealing with two stock heads it was an improvement. With a built head?
