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205 Brace Rod

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If you're replacing a 203 with a 205 behind a TH350, the 'cases interchange without any crossmember modifications. In the 208 to 205 swap behind a TH700 shown here, the crossmember was moved forward about 1 3/8 inches. Apparently GM used several versions of the 208 crossmember, however, so you'll need to bolt everything up and measure your truck to be sure. Also, the 205 brace rod (arrow) had to be lengthened to accommodate the longer drivetrain package the TH700 created.