[Mike C]

Crossmember mount is same position as TH400 but as noted, the length and driveshaft are same as TH350.

Like I said above, the Grand National's 3.8 SFI turbo motor came with a TH200-4R and with a chip it easily put out 350 rwhp and probably 450 lb/ft torque. It should hold up to a mild big block if the trans is built using the internals from one of those. Obviously the TH200 that came behiind a 3.8 non-turbo would not be as beefed up.