I know you have to have the 'adapter'.
But I was searching and never found out, can you use the stock tach wire from the harness going into the cluster?

My friend swapped in a Z24 cluster into his base model(no tach) and the tach from the Z24 works.

Couldn't you use the tach wire from the cluster harness to wire up the tach?

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I'm pretty sure no one's tried that. People have used the purple w/white stripe wire which gives you a reading of half at 4 cyl. and an accurate one at 2 cyl.

Although you could do like your friend and swap in a cluster w/ a tach....

Well I have a tach just sitting here collecting dust, I'm willing to just give it a try and see if it worked or not.

Anyone have a diagram of the harness?

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