Same with Briggs; their engines don't have any oversize pistons available, and I don't know of anyone who makes aftermarket oversize pistons for them, either.
Also, I'm not all that concerned with the side panels and hood. A hammer, wire-feed welder and tin snips will make allowances, because hey, it's a 20-year old garden tractor, which is why I'm not going to spend $1600-$2100 for a new engine repower kit. The biggest concern is the muffler; I can build one, but it's much easier to buy one that will fit. The crankshaft is the same height, the block mount-pattern is the same; the only concern is overall length to the deck clutch, and that can be remedied with the length of the crank-to-hydrostat shaft adapter.
Also, I'm not all that concerned with the side panels and hood. A hammer, wire-feed welder and tin snips will make allowances, because hey, it's a 20-year old garden tractor, which is why I'm not going to spend $1600-$2100 for a new engine repower kit. The biggest concern is the muffler; I can build one, but it's much easier to buy one that will fit. The crankshaft is the same height, the block mount-pattern is the same; the only concern is overall length to the deck clutch, and that can be remedied with the length of the crank-to-hydrostat shaft adapter.