As the title states I am chasing mecanical speedo sender that what I call it and I probly wrong and also a harmonic balancer as my engine is out of a GT4 and they have a 4 v belt as my old engine had a 3v belt so I had to change the pulley on my alternator to match the engine
Cheers

I hunted around for a mechanical speedo sensor and weighed up the pros/cons of new/2nd hand... I went new (toyota) from www.amayama.com order the pieces you need depending on what is working and what is broken....
 
33403-19406 Gear sub-assembly, speedometer 
83798-17010 Key, speedometer adaptor 
83770-17020 Adaptor assembly, speedometer 
83798-20020 Key, speedometer adaptor
83710-17150 Speedo cable 66 inch
 
Prices as of 6 months ago
Toyota 8377017020 (BJ JP) - 117.13 AUD, 1 items
Toyota 3340319406 GEAR (BJ JP) - 19.40 AUD, 1 items
Toyota 8379817010 PIN (BJ JP) - 6.68 AUD, 1 items
Toyota 8379820020 (BJ JP) - 7.18 AUD, 1 items
Toyota 8371017150 CABLE (BJ JP) - 40.93 AUD, 1 items

all sorted I have purchased both