According to Eberg, the magnum heads did have multiple bolt holes in the side and he provided a pic of this. How it mounts, I am not aware of but the thing with magnums is they also don't have the mechanical fuel pump location in the cover. I am wondering if these late 318LAs have the same setup or not. I do they they have an electrical fuel pump too so my guess is that the covers are like the magnums. I would need to have 2 engines side by side to figure it out and at the moment, my old LA is at the shop and I do not have access yet to one of these late LAs.