Head Korn-Fussion??? Nate, Studebaker George, Lee DB???

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Grumpy AuContraire - 07 Jan 2009 01:03 GMT

I have acquired a '59 Lark V8 engine that has 537555 or ??? 537565 heads
(hard to tell what the fifth digit is) that have broken exhaust
manifold studs.

Can I substitute some 1567570 heads (off of a '63 Cruiser)?

I'm interested in maintaining the highest possible compression ratio.

TIA

JT

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bobj - 07 Jan 2009 13:24 GMT

> I have acquired a '59 Lark V8 engine that has 537555 or ??? 537565 heads
> (hard to tell what the fifth digit is) that have broken exhaust
[quoted text clipped - 7 lines]
>
> JT

555's are 8:1 comp / 570's are 8.25:1 Both are 54.5 cc.
Should work fine!

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N8N - 07 Jan 2009 13:50 GMT

> > I have acquired a '59 Lark V8 engine that has 537555 or ??? 537565 heads
> > (hard to tell what the fifth digit is) that have broken exhaust
[quoted text clipped - 10 lines]
> 555's are 8:1 comp / 570's are 8.25:1 Both are 54.5 cc.
> Should work fine!

One thing to keep in mind is that rocker assemblies and pushrods
should be kept together. I think there was a change somwhere between
those years.

nate

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Grumpy AuContraire - 07 Jan 2009 17:03 GMT

>>>I have acquired a '59 Lark V8 engine that has 537555 or ??? 537565 heads
>>> (hard to tell what the fifth digit is) that have broken exhaust
[quoted text clipped - 16 lines]
>
> nate

I don't have any options as regards pushrods/rocker assemblies as I have
the heads only. I thought that change occured around 1961 or '62. I
will have to use the set up off of the '59 engine.

BTW, I do need a set of "short" (early) pushrods for another project.

Can anyone confirm?

BTW, I need a new or good used exhast valve. Any out there?

TIA

JT.

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Grumpy AuContraire - 07 Jan 2009 17:04 GMT

>> I have acquired a '59 Lark V8 engine that has 537555 or ??? 537565
>> heads (hard to tell what the fifth digit is) that have broken exhaust
[quoted text clipped - 9 lines]
>
> 555's are 8:1 comp / 570's are 8.25:1 Both are 54.5 cc. Should work fine!

Great! It looks like I might gain a hairline of increased compression
out of the switch.

Thanks!

JT

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WayneC - 07 Jan 2009 23:51 GMT

>>> I have acquired a '59 Lark V8 engine that has 537555 or ??? 537565
>>> heads (hard to tell what the fifth digit is) that have broken
[quoted text clipped - 17 lines]
>
> JT

I don't think so... if the cc volume of the head is the same, then the
pistons or the crank throw had to provide the extra compression.

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