Dash wiring Question

[onlychevy6]

Ok i purchased the 18 circuit painless wiring kit for my 75 blazer most of it is done. However i also purchased a factory tach gauge cluster out of a mid 70's chevy. So my question is. There is a purple and white wire that says it is for the tach. It is attached the the wires that connect to the plug that goes into the speedo part. Does anyone know where to hook up the tach wire? There is 3 seperate wires connecter to the back of the tach that i assume go to the Dist.?

Any feed back or pictures would be greatly appreciated.

Thanks
Jeff

 

[pauly383]

There may be 3 seperate wires , but the HEI unit has only one connector on the distributor .

Muddytazz has wiring diagrams of factory stuff here http://community.webshots.com/user/muddytazz

 

[onlychevy6]

thanks for the info.