Will GM 200r4 work with factory floor shift location?

Treblig said

You're certainly entitled to your choice of cross members. But if you're trying to save money like me you could easily tuck some 1" X 2" box iron (laying sideway) between the sub frame connectors because the factory trans cross member is about 1 1/2" tall so that leaves 1 1/2" of space plus the extra space between the exhaust pipes and the upper cross member. The box iron would only be 1" tall laying on it's side. But that's just me, I like to make stuff!!
The route you're taking would be easier.

Treblig

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Treblig, I like the idea of adding more rigidity in that area, but I am no mechanical engineer. I would like to add a short triangulated bar to the front of the subframe connectors to original torsion bar crossmember, but there's not a lot of room there unless I just use just a triangle piece of flat plate and weld it to the inside, bottom at the intersection of the subframe connectors and the factory crossmember.

For crossmember add-ons, I've always liked the look of the round tube type crossmember with the mandrel bends for the drop down at the trans mount with a flat tab to mount the rear trans mount, but I don't have the technology for that at home. I guess if I found a race care fab shop in my area the could make me up one, but this isn't LA.

Which rear mount did you use? I was a bit confused when I started looking at the Chevy parts on Summit. They didn't list a 200R4 mount, but just about every other one.