You are quite correct here Holbay developed these and they were quite successful, but they are very different from a YB, which were developed well after the MK1 and Mk11 Escorts used by date.
Roger



Quote Originally Posted by escorthvn View Post
Hi all, I have been watching this posting with interest as I own a Mk2 Escort with a YB Cosworth. My understanding is that the YB was not designed until about 1983/84 but Ford built engines in 1973/74 period with 16 valve heads based on the pinto cortina 2 litre block. I was in England in 2007 and took many photos of this car with a 16 valve 2 litre cortina engine. I have many detailed photos of the casting nos. and engine nos. on this engine. RS2000 Mk1 Escorts were homologated with a 16 valve 2 litre engine. Looking at the homologation papers the photos of the head look very similar to a YB head. My understanding is that these heads are Holbay heads.
Pete