I switched over to the 8.1 and W-22 from the Ford Chassis and the V-10 Triton Motor. My V-10 Triton was a 1999 and Ford had issues with the spark plugs staying screwed tightly into the block. I liked my V-10 outside of it didn't have enough pep going over Mountains and passing other vehicles. I bought my 8.1 Chevy Vortec (It's 496 Cubic Inches) in 2004. I bought a new top of the line gas 36' Winnebago with a Allison Transmission and a W-22 Workhorse Chassis. There was a brake recall (Bosch supplied Workhorse with faulty calipers). I never had any troubles with the original brakes on the coach. If the Bosch recall hasn't been done a Workhorse Dealer will make the repair for you free of charge. Check the service records of the Kountry Star to see if this has been done. I also had new brake linings installed at a small cost when the Caliper repair was done. I wanted everything to me new when it came out of the shop. To my knowledge there was 2 other recalls a fuel line clip that holds the fuel line to the frame rail. That repair is also free (a Workhorse issue) and took about 3 minutes for the repair and there was a 3rd recall which I haven't done yet and it's a speedo cluster panel repair kit (which is a Workhorse issue but not a safety issue) and that is a free repair to this day. I do not have one regret in buying the 8.1 with the W-22 Chassis. My coach will be 11 years old on Jan.15th and I've had very little problems overall with the coach. I also use Mobil 1, 5W / 30 synthetic motor oil in the 8.1 and change the oil and filter once a year since my coach was new.