MarkP- I was in the same boat as you are now and ended up with a 2013 Chevy 4X4 3500 CC, LWB Diesel DRW. Absolutely love this truck! Have a AF996 on order and although I haven't yet carried it, from all that I've read, to me it just wasn't worth the trouble to upgrade all that stuff to make a SRW work. I too want to tow a trailer (with a bike or two) and wanted the diesel to make the trips enjoyable. If you can swing a new Chevy, I'm fairly sure, you won't be sorry. BTW, do you guys run at Firebird west? I've been on that track on my 600F4i and had an blast. I've seen Indy car testing go on there as well and figured your class might have run that circuit.