Basically yes. If you buy an aftermarket cover they have both bolt patterns. I suspect you can take a 20 bolt cover and drill 2 holes and it will fit on a 14 bolt motor although I haven't tried it. It wouldn't work the other way.
I've really never tried to do it either way myself. So you can actually put a 14 bolt cover on a 20 bolt block eh? I figured a 20 bolt cover on a 14 bolt block would work.
Neal
Lee Thompson said:
As Neal suggest, I have drilled and tapped a 14 to use on a 20 block.