Wow, this is exactly something I'm looking at building in the future, but with an OM605 or 606 and a 6-speed.

Too bad I didn't learn about this sooner!

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1984 500SE
1985 190E 2.3-16
1997 Jeep Wrangler
1998 Dodge Durango SLT 5.9
1951 170S
1996 Ford F350 7.3 ZF5 swap