I've got an '85 Scepter with a volvo penta 35O GM & a 290 drive. Gas is 140 gal. plus normal fish/toys, cooler, etc. and I know I need a 7000 lb. GW trailer. Add a second engine/drive and your adding 900-1000 lbs. Gas is about 7lb./gal. Times 140 and you're looking at nearly 1000lb. in fuel alone. Just saying.