Is there a difference between the front doors for a 2dr quad cab vs a 4dr quad? I’m wondering if doors from a 94-98 will fit on a 98.5 truck. 

the quad cab front doors have square corners at the bottom where it meets the rear doors. the 2 doors are round on that corner.

Dripleys right. Just for future reference, a 2 door is considered an extended cab. Only 2 doors open.  A 4 door has 4 opening doors hence the name quad cab. Quad =4.

Okay thanks guys