Installing a factory tach from GMC Pauls - The 1947 - Present Chevrolet & GMC Truck Message Board Network

kxmotox247 · 09-09-2004, 08:49 AM

Hopefully it will have arrived by the time I get out of work tonight. I'm pretty pumped up to put it in. Since I ordered it, I've seen that there are wiring harnesses for 67's and 68-72's. What is the difference? I have a 67' and I don't remember telling GMC pauls that I had a 67.
Also, is there anything I should know about hooking it up to my HEI? I read in some street rod wiring diagrams that tach filters are needed to read RPM's off of a tach. Does anyone know anything about that?
Thanks!

09-09-2004, 08:49 AM	#1
kxmotox247 Senior Member Join Date: Jul 2002 Location: Champaign, IL Posts: 1,397	Installing a factory tach from GMC Pauls Hopefully it will have arrived by the time I get out of work tonight. I'm pretty pumped up to put it in. Since I ordered it, I've seen that there are wiring harnesses for 67's and 68-72's. What is the difference? I have a 67' and I don't remember telling GMC pauls that I had a 67. Also, is there anything I should know about hooking it up to my HEI? I read in some street rod wiring diagrams that tach filters are needed to read RPM's off of a tach. Does anyone know anything about that? Thanks! __________________ Baby Blue's Build Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=652776 Project 68's Build Thread: http://67-72chevytrucks.com/vboard/s...17#post8442117 www.stonecolumnclassics.com Email: Josh@stonecolumnclassics.com



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