Viper Dart Suspension questions

The suspension will hold up, I'd get a set of 1.03" or 1.06" torsion bars, box the lower control arms and probably run tubular uppers.

I think your issue will be getting an exhaust system to clear the torsion bars and a pan to clear the K member, not sure how the V10's are set up for their manifold exit locations or oil pans. That pesky firewall might be in the way too. :D

K frame reinforcement isn't all that hard if you can weld, I've TIG welded one and MIG welded another. The plates to box the steering mount are pretty easy to make, and extra thick washers can be used to reinforce the LCA pivot and strut rods (if you don't use adjustable strut rods, which I probably would). With a MIG it doesn't even take all that long.

You'll also want to install subframe connectors. I'd look into other chassis stiffening as well if you really want it to handle well, like a tubular radiator support, J bars etc. Check with Badart on here, or at his online store here.