1998 Ford E450 Super Duty Triton V10- opinions?!

How many miles ?
I don't suppose you can get any maintenance records ?

I think in general the engine itself is pretty rock solid.
I don't know about aux. systems like A/C, alternator, etc.
There are a lot of them around; I'm sure others will chime in.

I'm just finding out that the ball joints probably need attention around 50K miles AND the factory settings for the alignment sucks.

I think you can expect 8 MPG or a bit less; that's what I get with my '07.