I looked on Rockauto.com and they have several different fuel pumps for my truck. They list pumps for different gallon tanks (19,26,34 and 35 gallon). They also list pumps for, engine vin 2,engine vin D and engine vin 2 code EZB. The problem is I do not know which one I need.
It is a 2008 4 door Dodge Ram 5.7 Hemi Big Horn. How do I find out which one I need.

1.33 60 ft,6.21 at 110.59 in the 1/8, pump gas small block,2950lbs,drag radials,mufflers and driven to track ...