Ok, a little info on 190/195s.
There were in the neighborhood of 280 Cessna 190's made. They had the Continental 670s on them. The way you can tell if it is a Continental vs a Jake is that on the Continental, the pushrods are on the back of the engine VS the front on the Jake. There are a TON of 220 HP Continental 670s out there on Stearmans, etcetera, but since the Cessna 190 had a constant speed prop on it, and the only airframe Continental made the constant speed 670 for was the Cessna 190, there just weren't that many made. As parts became increasingly difficult to find for the Cessna 190 Continentals, more and more 190s had the Jake put on them. That effectively makes them a 195, but according to the FAA, they are still 190's. My plane is like that.
Bottom line is, even though the airplane may be called a Cessna 190, it does not necessarily mean that it still has a Continental engine on it. If you see pushrod tubes on the front of the engine, it is a Jake, and that plane has been converted. If you DON'T see pushrod tubes, then it is the original Continental.