'74 gauges
Drifting
Joined: Oct 2007
Posts: 1,317
Likes: 22
From: Marina CA
Speedo and tach mechanical. Clock, amp, temp and fuel electrical.
I think your 74 has an electric oil pressure gauge, not sure if 74 or 75 was when they replaced the mechanical oil pressure gauge with the electrical version.
I think your 74 has an electric oil pressure gauge, not sure if 74 or 75 was when they replaced the mechanical oil pressure gauge with the electrical version.
Race Director
Joined: Aug 2007
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From: Canboro Ontario
Team Owner
Joined: Jun 2000
Posts: 38,923
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From: Southbound
Cruise-In II Veteran
The tach cable fitting on the distributor and from there to the rear of the tach.
75 with HEI.
Tachs look the same, but drive differently.
...When did they change to an electrical tach, 75 76?...
...Was it the same appearance wise as a 74?...
Thread Starter
Melting Slicks
Joined: Mar 2010
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Verdad Gallardo
Team Owner
Joined: Jan 2006
Posts: 37,637
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From: Crossville TN
Oil pressure gauge changed in '74. As a 'minor' point-of-order, the clock is electo-mechanical. It has an electrical winding solenoid with a contact set and a balance wheel with spring/gear mechanical movement. The spring unwinds every 2 minutes when the contacts touch and fire the solenoid, which rewinds the spring. Pre-quartz movement with electric winding system.
Drifting
Joined: Jul 2002
Posts: 1,944
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From: The only Corvettes in Highett Victoria
gauges...........
old sarge, Paul,
1974 had mechanical tack and electric gauges. Mine HAD a capillary non-Corvette oil gauge fitted, but I bought an electric one from the USA many years ago that was not from a '74, but looks the same font etc. as the other gauges. I thought it was a '72 or '73, but it's electric and it fits.
In 1975, Corvette went to an HEI dissy with no mechanical tach drive, so tach was electric. Several vendors have HEI tach drive distributors, I have one in mine, and you might want to go this way, but the NCRS crowd might frown on it
Regards from Down Under
aussiejohn
1974 had mechanical tack and electric gauges. Mine HAD a capillary non-Corvette oil gauge fitted, but I bought an electric one from the USA many years ago that was not from a '74, but looks the same font etc. as the other gauges. I thought it was a '72 or '73, but it's electric and it fits.
In 1975, Corvette went to an HEI dissy with no mechanical tach drive, so tach was electric. Several vendors have HEI tach drive distributors, I have one in mine, and you might want to go this way, but the NCRS crowd might frown on it
Regards from Down Under
aussiejohn
Team Owner
Joined: Aug 1999
Posts: 30,995
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From: Ontario
old sarge, Paul,
1974 had mechanical tack and electric gauges. Mine HAD a capillary non-Corvette oil gauge fitted, but I bought an electric one from the USA many years ago that was not from a '74, but looks the same font etc. as the other gauges. I thought it was a '72 or '73, but it's electric and it fits.
In 1975, Corvette went to an HEI dissy with no mechanical tach drive, so tach was electric. Several vendors have HEI tach drive distributors, I have one in mine, and you might want to go this way, but the NCRS crowd might frown on it
Regards from Down Under
aussiejohn
1974 had mechanical tack and electric gauges. Mine HAD a capillary non-Corvette oil gauge fitted, but I bought an electric one from the USA many years ago that was not from a '74, but looks the same font etc. as the other gauges. I thought it was a '72 or '73, but it's electric and it fits.
In 1975, Corvette went to an HEI dissy with no mechanical tach drive, so tach was electric. Several vendors have HEI tach drive distributors, I have one in mine, and you might want to go this way, but the NCRS crowd might frown on it
Regards from Down Under
aussiejohn
Breakerless SE this summer for me. I like to retain the distributor cover. Can't be done with HEI.
