4SPEED427 wrote:

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Interesting that the rad was in a 66. I don't doubt it was in a 66 but the rad is actually a 65 rad, with the neck for the upper hose on the passenger side.

I wish there was a cheap way to get it here, I could use it on an engine test stand.

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 I was wondering about that actually... Googling 3158903 actually turns up results for earlier cars too. Is "64 B" a date code?

-- Edited by jduffett on Sunday 20th of February 2022 01:57:44 AM

4SPEED427 wrote:

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jduffett wrote:

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4SPEED427 wrote:

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Interesting that the rad was in a 66. I don't doubt it was in a 66 but the rad is actually a 65 rad, with the neck for the upper hose on the passenger side.

I wish there was a cheap way to get it here, I could use it on an engine test stand.

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 I was wondering about that actually... Googling 3158903 actually turns up results for earlier cars too. Is "64 B" a date code?

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 I should correct my statement, it's a 65 or prior rad because of the upper hose location. It could well be 64, I don't know those cars very well. Perhaps someone here can tell a 64 vs 65 rad?

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 I believe it is a 64 rad, looks identical to to one in my shed. 283 powerglide. My new griffin rad is the same configuration with both hoses on the passenger side.

I see the diff only has 1 upper control arm.

Just curious. On the lower control arms, are the forward bushings the same size as the rear bushings?

seventy2plus2 wrote:

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Just curious. On the lower control arms, are the forward bushings the same size as the rear bushings?

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 So no, they are definitely different sizes. I'm not sure what diameter they use to define the size of the bushings, but here are are few photos illustrating the difference:

oshawacliff wrote:

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Good info to be added to a sticky?

With photos.

 

 

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 Actually Cliff, looks like there's already an appropriate thread here: https://canadianponcho.activeboard.com/t67163070/65-66-rear-lower-b-control-arms-same-as-67-70/

I'll add my photos there, and yeah, it would probably make a good sticky.

Oshawa65SS wrote:

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The part number for your rad being listed in the Canadian GM Parts Catalogue No. 651 December 1964 speaks to it being a Canadian car original, 

so I'm hoping you can confirm for me whether or not there's a Harrison logo on the top tank, and if the 3158903 part number is stamped on the frame?

Does the heater core have a Harrison logo tank and a date coded tank, or are both tanks plain?

Thanks, Ryan

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Ryan,

I can't find any Harrison logo on the rad, nor did I see a part number on the frame. Do you know whereabouts that would be?

Both tanks on the heater core are plain.  

Thanks for the info you guys
It's confirmation of my thoughts re no logo on Canadian rad and heater core tanks too
Great to see a pic of the date code tag soldered to the rad core
Worthwhile to reproduce
The part number etc is on the drip hose side of the rad frame on a Harrison rad I have
It decodes to 65 Chevy passenger with 283, PG, no a/c, non heavy duty
No idea if Canadian rads have their frames stamped the same way BUT the frame is separate from the rad so?

In 1966 the Canadian B bodies did have Harrison on the tanks, at least my friend's unmolested 66 Impala does. Maybe they changed it up after 65? We know the 2 years don't interchange because of the opposite sides for the top hose.

4SPEED427 wrote:

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In 1966 the Canadian B bodies did have Harrison on the tanks, at least my friend's unmolested 66 Impala does. Maybe they changed it up after 65? We know the 2 years don't interchange because of the opposite sides for the top hose.

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 1966 Pontiac Custom Sport 396, original rad...