Im trying to figure out what size briggs I have. It was on a Montgomery Ward edger but the shroud has no numbers on it and the edger model is zmy 161c I think some is scratched out. The block is aluminum, 8 bolt head and it has points. The bore is measured at around 2.371 and stroke is 1.5. I have looked through endless posts and even the briggs book and I cant find anything. It has a pull choke pulsa jet carb. Cant find any numbers stamped on anything. Any help would be greatly appreciated. I have attached the edger pic, model, and the block stripped down.