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No. None have ever been documented. :thumb

3.70:1 was the highest (numerical) axle ratio available with either L36 or L68, and it was only available on those engines with the close-ratio M21 4-speed or with Poweerglide. There was no such thing as a 12-bolt diff in a Corvette; they used a totally unique 10-bolt diff that shared no parts...

The '62 wheel hub pilot hole diameter is 2.783"/2.786", same as the midyears; '61 and earlier is 2.91". If your '62 has the earlier/larger front hubs, you MAY have to provide additional clearance, but that area is nowhere near the threads for the spinner - it's at the other end of the adapter...

Either both front park/turn bulbs failed simultaneously (unlikely), or the bright filaments in those two lamps aren't getting power. Go to the connector between the steering column and the dash harness (with the ignition on), and flip the turn signal lever - to the right you should see power on...

I'd check the terminals on the switch for contact and continuity between terminals in each position, and see if that matches up with the wire colors in the connector. The wiper motor works based on the (grounded) switch grounding different wires for different speeds - only the motor sees 12V...

I can't think of anything block-wise that would make them unsuitable - depending on casting dates, the 351 will work for a '67, and the 321 would work for a late '67 or '68. The front block pads will take a 50-point deduction for the incorrect machine code stamps and missing VIN stamps, but will...

Cable-Dahmer Chevrolet is also the sponsoring dealer for the Kansas City NCRS chapter. :beer

That "Godzilla" spring was only used on '56-'62 Corvettes; all the '65 has is a simple return spring. :beer

It's an all-day job - lots of things have to be removed in order to get to the clutch. :beer

GM dealers have a product made specifically for heat risers - it's called "GM Exhaust Heat Riser Valve Lubricant"; if one is stuck, it will usually loosen it and keep it operating properly. :beer

The 65's use two separate "T-nut" top and bottom handle reinforcements per pull, riveted to the door inner panel; '66-'67's use a much longer single reinforcement/nut-plate instead, which is much stronger and distributes the load over a larger area on the door inner panel. You can use the...

You didn't supply your VIN, so we don't know when your '64 was built. As a general rule, you'll be fine if the radiator and supply tank are dated the month prior to the car's final assembly date. If you order them from Dewitts (the manufacturer), they'll ask you for your VIN and date them...

Corvette Powerglides were air-cooled from 1953 through early '63 production; from there through 1967, they used a separate trans fluid cooler mounted ahead of the radiator. Starting in 1968, automatics had the trans fluid cooler integrated into the passenger side radiator tank. :beer

It's a 4.11. 9:27 would be 3.00:1, and that never existed (and wouldn't work due to the even tooth count). 9:47 would be a 5.22:1, and that never existed. 9:37, however, is 4.11:1, and that's the OEM tooth count for the 4.11. :beer

Adding good A/C will help you enjoy the car and drive it more often, especially with your weather; brakes don't need an upgrade (assuming they're in good condition) - they were good technology in '66, and still are today. :beer

The calculator comes back with a 4.96:1 axle ratio, so it's most likely a 4.56 axle with some speedo error. There are no 100-mph blasts in your uncle's future until he changes the axle ratio to something more street-friendly. :beer

I can't imagine trying to change the steering column jacket (tube) without removing the internal shaft, bearings, etc. - it only takes about ten minutes to remove the column assembly from the car and work it on the bench where you have proper access for tools. :beer

The 519 block shows as used for "mid-to-late '58" - I don't know offhand if December is too early; I'd call Tim Mickey, the National Judging Team Leader for '58-'60 - his contact info is on the inside front cover of the NCRS "Restorer" magazine. :beer

A block is a block, and none of them know whether they're automatics or manuals until the flywheel or flexplate is installed; all block machining is identical for all applications. :beer

Rochester hasn't existed for decades, but there are several sources for reproduction ID plates for F.I. units. I don't have a '65 JG for the details, so I don't know if a 4800R unit existed then or not. Jack Podell, John DeGregory, or Jerry Bramlett would, though. :thumb