Okay I bought some 75 hp DDP injectors.The guy said there was only 2000 miles on them and also he would give me the paper work on the injectors but hasnt.

so my question is how do you tell what size they are or should I get them tested?

 

No doubt you should verify size and current condition/performance to ensure "it's all on the level".

 

Oooops... about forgot, you should have a local diesel shop there in Texas that can help.