Just finished doing a manual conversion on my 262C so I thought I'd post some info.
I parted out an '80 264GLE manual to get most of the parts.
I wanted it to be manual so it would be better to drive and have better fuel usage. plus the BW55 was terrible, I had considered fitting an AW71, but I'd prefer to have a manual. with the 3 speed at 110 it would rev at 3500rpm, fuel economy and acceleration were pretty bad. The car has a recently rebuilt B28E with bigger exhaust and some minor modifications, so I was happy to keep the current engine.
Before
Manual parts
@Angus242164 supplied a new clutch hose
I have a band new V6 clutch spare, but when I removed the one from the parts car it appeared to be almost new, so I decided to use it. I used the pedal box from an '89 240 since it was already removed, basically everything else came from the 264 or was bought new.
New pressure plate bolts with T40 head
Auto pedal box and firewall panel removed
Also took the opportunity to fit a later brake booster, the early one worked fine but the hole for the check valve is bigger and a standard seal//valve doesn't fit.
Manual firewall panel installed
Pedal box fitted with new pedal covers
Clutch master cylinder installed
Auto removed
Flywheel, pilot bearing, new rear main seal, and clutch installed.
Clutch hydraulics and throw out bearing installed
Gearbox and shiftier installed
Clutch hose connected, not much clearance on a V6.
Vibration dampener and OD solenoid installed
Tailshaft installed
After running it I realised the gearbox was sitting too high and the shiftier linkage was rubbing on the top of the tunnel. I fitted these spacers off an AW71 240 and it sits at the correct height.
Bertone gear knob with tan leather cover, the overdrive is on the end of a wagon wiper stalk.
Its much nicer to drive now, acceleration is better and a lot more responsive.
Next I plan to fit some bronze shiftier bushes and a slightly different leather cover