Your favorite rear end/final drive ratio and why?

@SleeperDart505
I had my 200-4R OD trans built by Extreme Automatics located in Amelia, OH. It was built several years ago so I suggest you
check with them on current pricing for how you want your tranny built.

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I had them remove the existing factory GM bellhousing from the 200-4R and replace it with a Reid Racing bellhousing to mate up to my smallblock Mopar. I don't know if a Reid Racing bellhousing is made for a BBM. Again, you should check with Extreme Automatics (www.extremeautomatics.com) to find out.
No tunnel surgery required to fit the 200-4R in your '68 Dart.
There are a bunch of threads on FABO about this trans. Check 'em out.