Yes, Dave.
Both the rocker box pillars needed machining. I’ve gone for the rotary pump and will be adding additional engine breathing. Bryanj mentioned early failure of his Morgo conversion. I can’t vouch for the product of yesteryear, but I checked out Morgo and Routt variants in person and to be honest there was very little to choose between them. In the end I bought British.
Next big decision is whether to purchase updated rods. Mine are straight without any external evidence of stress and have been peened and polished, but I’m just not sure. I’m going for an efficient tune, not a high revving, high compression arrangement. At £250 per rod it’s a big investment. I just can’t conclude if it’s a necessary one…