I'm looking at buying a 99 6 speed 3500 2wd. My question is whether or not it is a 245/505 engine or 235/460? It has same fuel filter as the 98 24v my boss has. I didn't think they made the HO's until 2000. I test drove it to make sure, and yes it has six speeds, feels like more than 235 hp. Let me know. Thanks.