There is a very unique feature that I designed into the chassis - the ability to use multiple different powertrains. The chassis accepts a k member that bolts in with 4 bolts. Unbolt one powertrain and bolt in another. Before health became an issue, I had planned at least two different assemblies - the original NorthStar and a w41 quad 4 setup. But the capability is there for many combinations - 3.4 v6, supercharged v6, small block chevy, etc. It's a little hard to explain but hope I got the idea across.