Ryobi 31cc glow conversion
BTW, with the exception of the twin ring, I bought my other Ryobis at Harborfreight. They had a sale in one of their flyers for $49.95, soI bought two. I doubt you can find a bare engine block, reman'd or not, for less than that.
Try pawning off the rest of the weedwacker, chainsaw, etc. at your local service shop. Do try to get cash. Instead, barter for carbs, seal kits, and maybe other engines. Even giving the stuff away free is a not a bad idea, if it let you cozy up with the shop.