kit would include:

4spd transmission and bell
clutch
pressure plate
pressure plate bolts
240D flywheel
240D auto crossmember
flywheel bolts (used, manual recommends new but I reuse them once)
w123 full pedal assembly with master cylinder
slave cylinder
hyd line from master to reservior (these are generally rotten but the new part is $5
hyd line from master through floor
hyd line from floor to slave
W123 4sd shifter, rods and clips. I can shorten the rods if you want for the 300D
I will try to get a speedo cable, yours will not be correct length
wire harness from shifter (reverse lights, you will lose nuetral safety)
you will need to shorten the DS for a 300D. I can get one shortened for you for $75 plus cost of DS (should be around $20) it is recommended you do your own and balance the whole assembly together

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1982 300CD Turbo (Otis, "ups & downs") parts for sale
2003 TJ with Hemi (to go anywhere, quickly) sold
2001 Excursion Powerstroke (to go dependably)
1970 Mustang 428SCJ (to go fast)
1962 Corvette LS1 (to go in style)
2001 Schwinn Grape Krate 10spd (if all else fails)