@ Skull, isn't that always the goal? Gotta have some loud fun! I think 2.5 on each side I think that was what was stock on the van 2.5 dual to 3 or 3.5, but I'm thinking of true duals now, we will see...
@JFG, that is good to know, cause I need some gaskets for them!
@Neverdone, yea, I'm thinking that I'm going to lose the air cylinders, only because they work backwards to what I would want, either that or switch them around to be normally closed and use air to open them, I'm thinking mechanical instead of extra complication... this truck has enough complication for me at this point, I just need it to work so I can dump exhaust out the side somewhere...