Where would I get/ buy the right size drive shaft?
when did they put 4 speeds in Impalas?
1969?
Should be a shop within a few miles that makes shafts
Unless you live in the boonies
There are also several mail order companies
Six states
And
Tom woods
Are the largest
Id get a 5 speed from either 97-07 silverado Or 97-whenever they stopped making the S-10
Depending on your tire size and axle gearing
One may work better than the other based on the ratio of first gear
Find a donor vehicle and get as much as you can
Clutch master cylinder , slave cylinder
Resivior
Line from MC to slave cyl
Driveshaft
Shifter and boot and anything else you think you might need
Easiest way is to find a set of hydraulic pedals from a 85-87 square body and swap em in
You can make a mechanical pedal set work but it's time consuming