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Hey 71, I don't have a tach either but I do have an engine analyzer(tach/dwell meter).I put it on the dash and ran the cords thru the vent window and under the hood.After hooking the wires up the only thing left to do was take a ride.I now know that I have 3.07 rear gears.Took all of 15 min since I had to get gas to drive the truck.
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The 47-present Chevrolet and GMC Truck Message Board Network,it's owners,moderators,members,and associates of any type should not be held responsible for my opinion.
You can't fix stupid,not even with duct tape.
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Barrett-Jackson has perfected alchemy,they make rust into gold!
"You can lead a horse to water but you can't saddle a duck"
"Cleverly disguised as a 'Responsible Adult'
"Sometimes your Knight in shining armor is just a retard in tinfoil"
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