that's cool :y: I forgot I was the noob here ... too many years around the traps ... and sorry, didn't meant it to sound indignant ... I literally meant it as an offer to confirm it for you ... all good :y:
here's something for y'all to research ... I can't remember how accurate it was, but there used to be a designation system around the colour of the blocks ... I know of Ks coming in red, geen and black ... I was told it was something to do with the number of engines that had been made on that particular set of tooling ...