"S" cams in 4-bearing?

[blue72s]

Are new early S cams (pre-73) available in 4-bearing from Porsche? If so, what are the part numbers?

I'd also like to know the part numbers for original 3-bearing ones.

TIA

[john walker's workshop]

call webcam and have them do up some 4 bearing with S grind for you. or if you already have early S cams, use 3 bearing cam towers on whatever engine you build.

[Wayne 962]

The part numbers should be in the Engine Rebuild book's appendix.

It's almost easier to run the 3-bearing cam towers instead of the 4-bearing ones - there is no real known cause of failure for the 3-bearing ones...

-Wayne