Is this a troll post? Since when is a Chevy II a truck?
Anyways...
Might be complete overkill but you could use an NV4500. They're a truck transmission and can take the power you have.
Another option is the NV3500. It's not a strong as the NV4500 but it's stronger than a T5.
NV4500's can be found in chevy pickups.
NV3500's can be found in Jeep TJ's.
