There was enough flat transom to mount twin 140 Johnsons on my old '73. Luckily no one ever tried to launch it like that (can you say instant SINK?). I bought the boat like this with intention of using one engine and selling the other. Ended up using one for a while, then sold both motors to Skools, had the transom redone, rebuilt the entire trailer and sold the boat/trailer with new transom & no engine to buy my V21.