Heine, in the photos I noticed your chassis has the early single-point ZF mount in back. If you're going to upgrade to more power & torque, I suggest adding aftermarket-conversion ZF frame mounts that attach- not to the back of the ZF but to a pair of arms at the sides of the transmission case. These steel frame extensions were welded in place in later models and attached via a pair of cast-aluminum arms with rubber isolators built in. I've also seen some frame extensions that were locally fabricated, as well as a few that used salvaged extensions from wrecks or burned-out cars. The later system gives a 4-point mount (with the stock engine mounts) and better braces the powertrain. Plus original single-point rear mounts are getting harder to find in good useable condition after 43 years!
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