We actually started this build before I got the truck, with the "demo" chassis that we've been exhibiting at shows. All the chassis start from C7 Corvette geometry and suspension components, with an option for either 5th gen camaro IRS, or the "full fat" C7 Corvette trans-axle IRS. The demo chassis was setup for a transaxle, so I'm going to use an 8L90 for this one.
I've been doing some motor trading over the past year and ended up with a dry-sump LT4 sitting in the garage...perfect for this