Nice chassis - fully boxed with door bars and a backbone too. Did you happen to weigh it? FFR says their Type 65 chassis is 300 lb.
I would have guessed a little heavier than 2500. Did you dry sump to get the flat bottom? Are all of the components structural to bending moments in the chassis or are some of them to facilitate mounting aluminum panels?
I'll bet that thing is rigid as hell
Side note => I think Shelby listed the 427 @ 2500.