Looking to buy 03 F350 V10 need to know if it's 2 valve or 3 valve.

 

Two valve.

The 3V didn't come out until the 2005 models

 

Don't let the 2V scare you off the plug problems was fixed in that year and they have plenty of grunt when geared correctly. If the deal is right and you like the truck jump on it.finding a V10 can be like finding a needle in a haystack.also consider getting a oasis report.