1964 365hp correct #
Got a couple questions on a 1964 365hp part numbers. Intake manifold#3844461, overflow tank #3155416 64c, radiator#3155316 64c, steering gearbox#5666723 61, Holley carb#4099 pr1717b 3849804 list 2818 3a34b. Could someone tell me if these are correct? I know the block and heads are correct. Also where is the water pump # located? Thanks for any info. Lenny
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Re: 1964 365hp correct #
These numbers are documented in the 1965 Judging Guide...
The 2818 List carb should be date coded to match the car's final assy date (it was installed on the engine at St. Louis instead of at Flint). The primary metering block should be #4094 while the secondary metering block would be #4099.
The water pump's housing should be cast number 3859326 (it's located on the front/top surface obscured by the pulley) and date coding (opposite side of the front/top from the cast number) is thought to have begun in November of 1965 meaning factory originals for '65 production would be undated.
The upper boss of the water pump was drilled and tapped for a 1/2" NPT bypass elbow while truck engines using the same pump casting were larger: drilled and tapped for 3/4" NPT elbows. -
Re: 1964 365hp correct #
I'd probably agree, but then we'd be fighting 'City Hall', Michael. NCRS does not recognize the 3839175 pump housing and believes the 3782609 casting was phased out during the '63 model year.
The judging literature teaches folks the transition for high horsie, external bypass, SB pumps went from 3782609 -> 3859326 without the intermediate 3839175 casting being a 'legitimate' Corvette part...
When installed, it's reasonably tough to tell a '175 from a '326 pump. But, it's child's play to visually distinguish a '609 casting from either the '175 or '326 housings.
Soooo, my comment was focused on what NCRS considered 'right' versus what may, indeed, be the truth...Comment
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Re: 1964 365hp correct #
Well, now that we've had this discussion, he's aware of the issues here:
(1) What's considered 'correct' by existing NCRS judging literature and
(2) What's suspected to be 'correct' by some others...
So, we've fully aired the two contrasting views. Now, it's his decision on what to use on his car. Bottom line, finding either a '175 or undated '326 pump with the small (1/2" NPT) upper bypass hole will be a challenge that makes either part potentially costly...Comment
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Re: 1964 365hp correct #
I am reviving this thread due to having just read the 63-64 judging manual. Per the manual I just read, a 609 pump is shown to have been used on 63 and 64 high horse engines. So what is the deal with a 326 pump only for 64 when it is contrary to the Judging Manual.Comment
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Re: 1964 365hp correct #
Jack-------
I definitely believe that the 3839175 waterpump casting was used on SHP Corvettes during the 1963-64 period and, possibly, even into 1965. In fact, other than Corvette, the only other POSSIBLE application for this pump would be some MD/HD trucks with small block. No other applications existed for it among passenger cars in the 63-64 period.In Appreciation of John HinckleyComment
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Re: 1964 365hp correct #
Was there a change in the Judging Manual? I clearly read in the 1963-1964 NCRS Judging Manual L-84 engines were equiped with 609 water pumps.Comment
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Re: 1964 365hp correct #
Martin, Not all 63-64 L84 engines used a 609 pump according to section 13. page 107 of the 5th edition. JDComment
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Re: 1964 365hp correct #
I think the issue here was the use of a 3859326 water pump for some 63's.
While the 63-64 JG does state that the 609 was used for 63, it goes on to state that late 63's and all 64's used the 3859326.
The 3859326 was never factory installed on any 63's and if any were factory installed on 64's, it would have been late in the model year.
As Joe L mentioned, 3839175 water pump likely appeared for late 63 or early 64 cars and continued through much of the 64 run.
This has been discussed (beat to death) here a few years ago and everyone (almost) agrees that the JG should be revised to show this change.
This info has been forwarded to the TL and a few others in the org so I would expect to see this corrected in a new release of the JG.Comment
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Re: 1964 365hp correct #
leonard,
Aside from the water pump debate, I will attempt to answer a couple of other questions you had that do not appear to have been answered for you.
The intake you mention IS correct for the 64 365 hp car
The radiator IS correct for cars equipped with the 3155416 expansion tank
The carb body IS correct for your car which is as follows:
Carb List#-2818 (the NCRS pocket spec guide states R2818A)
part #-3849804
As Jack stated the correct metering blocks for this carb are:
4094 primary and 4099 secondary
and if correct (or original to) your car should be date coded as Jack described.
LynnComment
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Re: 1964 365hp correct #
[quote=Michael Hanson (4067);462963]I think the issue here was the use of a 3859326 water pump for some 63's.
While the 63-64 JG does state that the 609 was used for 63, it goes on to state that late 63's and all 64's used the 3859326.
The 3859326 was never factory installed on any 63's and if any were factory installed on 64's, it would have been late in the model year.
As Joe L mentioned, 3839175 water pump likely appeared for late 63 or early 64 cars and continued through much of the 64 run.
This has been discussed (beat to death) here a few years ago and everyone (almost) agrees that the JG should be revised to show this change.
This info has been forwarded to the TL and a few others in the org so I would expect to see this corrected in a new release of the JG.[/quot
Michael, The dilemma seems to be in the Judging Manual. According to the 63-64 Manual I viewed last night, the accepted waterpump for 63-64 high horse engines (inclusive of a L-84) would be a 609. Per, Joe's information it seems unlikely 326's would have been used until mid 65. Bottom line is I have a May 4, 1964 L-84 and don't want to use something that is wrong.Comment
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Re: 1964 365hp correct #
Ah... yes, I think that's exactly the same thing I said. Almost. NO 326 pumps for any 63 and highly unlikely for 64.
I think the 326 may have been used for early 65's though.
There is a LONG discussion on this in the old archives. I think Jorjorian and I started it, if I remember correctly. Or at least were the bad guys that fired the first shots.
I think there was a question about a 63 water pump and someone replied, said the JG called for a 3859326 for all 63-64's. (old 3rd or 4th edition) I think the war raged on for days.Comment
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