I cant speak for the motor but that 20 champion will ride like a cadilac on rough water. No doubt the 20 foot champion will out handle the lund its longer and alot heavier. Ive got an 87 20 foot Ranger with a 225 yamaha super slick boat about the same story as your boat. I tried out a 20 foot champion about that year model before I bought the Ranger it was in mint condition he wanted 10,000.00 for it.That boat new today would cost near 60,000.00 dollars. By the way Champions were made in Mountain Home Ar. in the area I live in.