Without a donor car for all the parts you will need, it will cost way more than the car is worth. My suggestion is sell this car and buy you one with an OEM manual transmission. You will be money and labor ahead.
I have researched this because I am considering making the conversion from automatic to manual transmission on my own 1995 240sx. It involves buying a manual transmission used from a junk yard or a rebuilt one, the clutch parts, a manual shifter, and the pedal with associated parts. there are actually lots of good resources to show you the specifics on how to do the work. Check out http://driftabout.com for links.
No because the driveshaft and transmission are diffent sizes.
YES!
its a vent hose
No, the only models that came with a trans oil cooler built into the radiator where the automatic ones.
there is no fill plug u fill transmission thru the transmission dipstick tube
3qts. 75W-90
You drain and refill at the transmission from underneath the vehicle.
The manual for my '95 240SX SE states: "The recommended fluid is type DEXRON II or equivalent." I have had trouble finding this type of power steering fluid. I *think* that is because it's actually an automatic transmission fluid.
It should be on the right hand side towards the front
When lube runs out the fill hole it is full.
Yes, as long as it's a KA24DE engine in both cars.