Valid.
Do they even make a chassis for an A-Body? Bet it is 3x more costly than a front clip.
Edit - Schwartz sells one. $26,7K with 14" brakes, double adjustable shocks, full floater 9" with an aluminum center, no powder coating and no assembly. The DSE X-Gen with double adjustable shocks and no powder coating is $9.3K.
Same Schwartz chassis with their IRS is $35,5K. Yikes!