Can i put a cummins diesel in a 95' dodge Dakota?

No you cant a diesal is to big

Correction:

The Banks Sidewinder Dakota has a 5.9 Cummins, but for a regular application the 4BT 3.9L 4 cyl Cummins could probably fit just fine. Some minor mods and 200 - 300 HP and 20 - 25 mpg is very realistic from one.