hello im new to all this and have a few questions i hope you can help me with.First off what is involved in changing my stadium truck into a monster truck,is it just bigger tyres and diferent gears ,and what would happen if i just put on bigger tyres without changing gears.Also i would like to have a rear exit exhaust, cos i want to make a roll cage and it would be easier to fix to the chassis,so can i just cut the manifold before it bends round and stick the stock muffler onto the modified manifold?One other thing is if i push the car down the suspension at the front comes back up very slowly and the rear suspension doesnt come back up at all ,i have checked it and nothing seems to tight and nothing is binding is there any way to make it more bouncy?thanks alot hope you can help

first thing ,bigger wheels and stock st gearing ,if u change to bigger wheels you've affectively changed the the final drive so what u'll end up with is no take off and a great top speed [if the engine is up to it ].
now the next thing is u cant just cut the manifold because this will change the harmonics of the exhaust ,or waves [ pulses back from the exhaust into the engine].
short exhaust = higher top end
longer exhaust =bottom end more torque [take off]
as for the rear dampers time to clean em out and refresh , maybe new seals. but check all the pivotable parts around the swing arms and the shock ,and the hub
hope this helps.

Instead of making your own roll cage, why not get the one from New Era Models? They are cheap, light and I can personally vouch for their toughness. If you got one of these cages there would be no need to switch to rear exhaust as they fit onto the standard chassis with no modifications needed. Just a thought.