87 D200 Exhaust size ?

After I get the gas tank moved, I want to run true duals on my 1987 D 200 4 wd. 318 stock motor.

What is a good size exhaust to run?

I have a ramcharger for parts that has a good set of duals on it,

But they are 1 7/8 size ?

What do you all think ?

Thank you

If you have them,try them.

318 stock motor, dual 1-7/8" is plenty of flow.

Thank you