Here's a breakdown of what's involved:
* Transmission: You'll need a suitable manual transmission (likely a Muncie M20, M21, or a Tremec TKO depending on your desired gearing and budget). Finding one in good condition can be challenging.
* Clutch Assembly: This includes the clutch disc, pressure plate, throw-out bearing, pilot bearing, and a new clutch cable or hydraulic system (depending on the transmission).
* Bellhousing: The automatic and manual transmissions use different bellhousings. You'll need a bellhousing that's compatible with both your engine and chosen manual transmission.
* Clutch Pedal Assembly: You'll need to install a clutch pedal, linkage or hydraulics, and a master and slave cylinder. This often requires modifications to the floorboard and potentially the firewall.
* Driveshaft: The driveshaft length will be different. You'll likely need a custom-length driveshaft or shortening of the existing one (requiring balancing).
* Shifter: You'll need a manual transmission shifter and linkage or cables, along with the appropriate mounting hardware.
* Wiring: While not extensive, you may need to make some minor adjustments to the wiring harness to accommodate the clutch safety switch (to prevent starting the car in gear).
* Flywheel: The automatic uses a flexplate; a manual transmission requires a flywheel.
* Possible Modifications: Depending on the specific transmission and your chosen parts, you may need to make modifications to the transmission tunnel or other chassis components to accommodate the new transmission.
In short: This is a major mechanical project requiring significant mechanical skills, specialized tools, and a good understanding of automotive systems. It's not a job for a novice. If you're not experienced in automotive repair, it's highly recommended that you seek the services of a professional mechanic experienced in classic car restorations. The cost of parts and labor could easily exceed the value of the car if mistakes are made.