[KAYE RIVERCITY]

.....20,000# aint nothin' for a class 8 but in a MTD level truck you will be close to max speed/grunt on hills but the speed flat out will be about 78mph max. I have a Cheve 6500 roll-off wrecker with a Catapillar 3126e X 6 speedX 3.70 set for 210hp at 520# it will pull it's 16,000 empty wt. very easy but load it with a car on the deck and another on the stinger-or maybe a boat or TT.....and we get real winded on the hills.....then again if I set it up to 330 hp at 860# I will do hills at 55mph+ but I loose MPG and my warranty goes up in smoke.....right now it is 8 years on the engine alone.....so everything is a trade off....make your choices wisely-there is no real right and wrong it is a matter of trade-offs....geof kaye