When Did Ford Change the Cam Bearing Design On the 429/460 Engines?

Today I was stripping down a block to hot tank for a customer. It is an original 1969 block that has never been rebuilt. When I was knocking out the old cam bearings I happened to notice that they are grooved. What's interesting is that they are not grooved all the way around and they are NOT grooved in between the oil holes. The oil that feeds the distributor hole on the front bearing has to go the long way around to get to the hole.

I can't remember seeing this in a later engine but it is sort of neat in that it keeps more cam bearing surface in between the holes.

THE ORG 69 BEARINGS are like this, just got rid of a set. still see them in BOSS 429s that I do

BOSS 429 wrote:THE ORG 69 BEARINGS are like this, just got rid of a set. still see them in BOSS 429s that I do

Just curious ... how about the 460's in the 68 Lincolns ...?

FUNNY you should ask,Im sure some of the bare blocks were 460s I found them in, newest block was a feb 70 date,Only reason I rem is I have that block in one of my cars still.

Last one was a BOSS 429 OCT 69