3406b pump mod help!!

Unless you are updating the transfer pump, I wouldn't change anything, when you enlarge the lines on the stock fuel system you will loose your pressure, the stock pump is made to work with those lines. For your HP level you don't need to change anything from what is already there, you may actually hurt performance.

 

I know this is late, but the AFRC is $385.00. I just bought one from the local Kenworth Stealership. I was able to talk them down to $314.00. Now all I need is a new CAC to get my rig back on the road.