update
thanks for the feedback so far. I've held off pulling the trigger. Geez, its a nice truck, and really cheap, but want to make sure I respect what I am getting into.
I've searched the site for parts sources for the 534 cu inch and am not finding much. I also talked to my local NAPA guy and we had trouble finding filters and other parts for it. BUT, I know there are a lot of fire departments out there still running these, so they are getting parts from somewhere. I guess I need to call FordMoCo and check.
Anyone have a reliable parts source? Hard to commit to a long term relationship with a big engine if I can't take care of her
Paul