Erm.....while trukks and battlewagons and
MANZ all have a place, it isn't in your army list.
Orks are great in a green tide list, or in a kan-wall (your list), or in a sneaky scout list, or in a mechanized list, or in a super-unit list, or in a gunline list...
But if you start combining elements of those themes into a single army list, you're going to lose. Orks can do anything that any other army can do and do it better, but only one at a time. You've got to pick a theme and run with it completely to be effective. Your theme here is kan-wall. You have the right army list to make it happen. Kans and dreads march ahead screened by 4+ invulnerable saves from the
KFFs, while the Big Meks and
KFFs march behind the Kan-wall getting 4+ saves themselves from the kans.
You've got a 6" moving army, it moves and fights together; units are interlocking, redundant, and complement each other. Exactly where does a trukk fit in there? Or a battlewagon? Those move 12-18" per turn. Are you going to send it up to the enemy army alone? If you're going to keep it next to you and move it 6" per turn, you're wasting it and you could have taken those
MANZ on foot and
2d6 +
d6 them every turn instead. No matter what, the unit doesn't fit into your list.
If you want to play with your
Manz, do this: Check out this thread, and the guy's army list. Replace a unit of boyz with a unit of
Manz, apply advice in the thread, and you have a pretty much perfect army.
http://www.dakkadakka.com/dakkaforum/posts/list/0/265245.page#1113036