A, B or "touring" cam?

[ursus]

Originally Posted by J Franklin

My late 30 engine had an early 5 bearing cam in it when I got it and it was a screaming machine. Got it to 70 once for a very short burst on the freeway.

I'm curious about that because I was told that the original 5-bearing cams gave slightly more power than the later 3 bearing cams, but with a less smooth idle.

I wonder how well the shorter 5 bearing cam bearings (especially the center bearing) hold up in a later engine block?