Excellent (rubbing hands together) another speed freak in the making!!!
Yes lots of trucks, I suggest red paint, all round, the extra 1" is so worth it even if you only use it once, getting a second free inch is just icing on the cake especially when playing for objectives.
The ram is essential equipment for all trucks, it allows you to go through terrain instead of around it, the shortest distance between two points is a straight line, and to get that second turn charge is to enjoy your enemy fleeing before you and hearing the lamentations of their women.
The plank is also a great extra, attacking enemy transports and then having their contents unable to assault your boys is priceless, and they REALLY come in handy for those blood angle dreads with sustained assault, because your nob gets his attacks without fear of retribution. Also it is really handy when attacking tau vehicles as then the flechetes can't cause any casualties.
As Axblade has stated; drop the storm boys and add another truck squad.
As for your BW, drop the cannon, you are not going to be shooting the thing if you are going full tilt towards the enemy so that you can crush things with the death roller and get the nobs into combat. Use the points for red paint, rams and planks on all your trucks. Take two big shootas for the weapon destroyed results so that you do not become immobilized on a bunch of 3's. Also on a BW is the only vehicle where grot riggers can actually pay for themselves so they are also recommended for the BW.
Keep the death roller it is so efffective against necron monoliths it is on the verge of cheese, not to mention land raiders and leman russ tanks. On the BW red paint is good, as that 13" run at the monolith is well worth the look on your opponents face when his invincible monolith is destroyed.
For the boss and the nob squad add cybork body to them all, you may have to drop a klaw or maybe use the points left over from not taking storm boys, but the chance to ignore power weapon and monsterous critter hits is wonderful.
Happy Hunting