Don H - Impala Tech
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post #1 of 7 (permalink) Old 01-16-2017, 02:13 PM Thread Starter
Join Date: Jan 2017
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Don H

Hi from Utah! I am doing a frame of on a 65 L78 Impala conv. all# matching Artesian Turquoise/Aqua int. /White Top, Bench seat.

Last edited by Big Dave; 01-16-2017 at 03:42 PM.
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post #2 of 7 (permalink) Old 01-16-2017, 03:49 PM
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Welcome to the Team Don!

Depending upon the month built that 396 block may be worth nearly as much as the car.

The first four months production run of the 396 was cast to be either a 409 or a 396. GM's executive board couldn't make up their collective mind (in an age before yes men) on the ultimate bore and stroke of the new Mark IV engine. Since they had held up production for nearly half a year (with the first four month's production of big block engines in a 1965 B-body being the venerable 409) the factory had to do something. So a really thick wall 396 was cast that could be bored out to a standard 409 bore (with two rebuilds of 0.060" over added with a minimal wall thickness still retained). With a standard 409 bore and a 454 crank shaft installed your 396 could be a 481 on it's next rebuild.

Just keep in mind all 1965 and 1966 big blocks require a grooved cam shaft that adds $75 bucks in machining cost to the build.

Big Dave
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post #3 of 7 (permalink) Old 01-16-2017, 09:14 PM
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Welcome to the team, always glad to see another '65!
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post #4 of 7 (permalink) Old 01-17-2017, 10:01 AM
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Welcome Don, love that color combo!!

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post #5 of 7 (permalink) Old 01-18-2017, 06:07 AM
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I love the convertible portion.
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post #6 of 7 (permalink) Old 01-20-2017, 10:57 AM Thread Starter
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The block was cast April 27, heads May 15,Exhust manifolds June 7.

The vin stamped in block is the only thing that authenticates it is a L78. There is only one other car that I am aware of & Hemming's Motor news said it was probably the rarest 1965 Chevrolet ever built!

That car has a CE block. Most L78 cars came with 4:10- 4:56 posi. My car was ordered with 3:31 open. It also came with electronic Ign. I think?
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post #7 of 7 (permalink) Old 01-20-2017, 09:09 PM
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Location: Lewisburg, Ohio
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Welcome from another 65 BB conv. owner.  69
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