Buy a Carter YF single carb and you will have a smooth idle and plenty of carburetor.
If you really want more performance out of your truck, switch to a T-5 transmission and a 3.73 or a 3.90 rear end.
You will be amazed how this unleashes every single horse power in an inline six! You can still pull stumps, and cruise at 70 MPH. You may even be able to cruise at 70 MPH while dragging the stump.
How, you ask? Having 2 extra gears keeps you in the optimal power range of your engine at every shift.
Carl
