\'73 Blazer Auto to Manual Trasmission Swap Hi Folks. I've got a 1973 Blazer and I'm considering an swapping in a manual transmission into my truck. It has the stock TH350 three speed and NP203 transfer case. Will an SM465 four speed manual and NP205 from another Chevy/GMC truck of the same era swap into my Blazer with the same driveshaft length? From what year model trucks can I find the clutch linkage, pedal assembly, etc, etc? I'd like to put in a NV4500 overdrive, but as it'll be a while before I can afford that I'm thinking about doing the stock four speed manual. With 4.56 gears and 35" tires, a manual will keep the RPM down a bit more on the highway. If you can help, please let me know.