Date registered: Mar 2013
Vehicle: 1967 Fintail 230S
Location: Miami, FL
Mentioned: 0 Post(s)
Quoted: 3 Post(s)
I was / have been contemplating a similar project for my 1967 W110. My 2.3L L6 screamed at highway speeds, and even with a 4 speed on the floor, was very sluggish off the line. I was lucky enough to find a complete rear end from a 4.5L V8 with discs, and that bolted right in. Gone are the original rear drums and low diff ratio.
I also used a brake master cylinder and reservoir from an early 1970's 4.5 V8, as my car originally came with powered brakes, twin circuits. Since you don't have much room on your firewall, you could look into getting a small hydraboost from a early 2000's Mustang (I don't remember exactly now). These are powered by the power steering pump, and should be cheap at junk yards.
The euro M110 with the long low intake runners may not clear the left side chassis leg of your car. I thought of doing the same thing, but those runners look like they take up a lot of space. I never had the opportunity to actually try putting one in a W chassis car though, so it just might fit.
I purchased a T-5 from a 1995 camaro V6 that has the gear stick at the end of the tail housing, and another T5 from a Chevy S10 that has the gear stick at the front of the tail housing. I am not sure if any will fit into my W110, but I am nonetheless collecting parts for a conversion.
Good luck with yours, and keep us posted.