Muscle Car Tv Sub Frame Mods????

[juveteach]

MUSCLE CAR on Spike TV!!!
Any one see Lou sunday on muscle car tv?

He took a 1st gen subframe, cut the main cross member out and replaced it with 1/4 flat steel boxing a 1" square tube and some braces.

Question is has anyone done this?
What about FLEXING over bumps?
Wouldn't it just bow in under the load?
They are using roll bars to hold their stuff rigid, would it be safe and work without roll bars??

Really want to do something like this but don't want it to buckle. Is this a good way or you guys got a better way?
The guys at W2W did a simular thing to their sleeper nova
http://www.w2wpowertrain.com/t-novabuild-2.aspx



S whats ya'll take on this, do it or not.
Thanks!