My 99 chevy dualie with 100K miles(low) has been great, needed a fuel pump once. Only because I was using a aux tank in the bed of my truck and it had rust in it.

No rust yet on the body and has all original running gear, front and back and original exhaust system. I did put shocks on it 3 times.

I'm going to replace it this week or next and am going to look at all three American makes seriously. I'm looking to run LP gas as fuel on my new truck and am afraid only Ford is going to be able to offer hardened valve seats for that use?