Re: [FWDLK] intake manifold '55

[Dave Homstad <dhomstad@xxxxxxxxxxx>]

The 55 Plymouth 260 V8 is essentially a 55 Dodge 270 Poly V8, so all parts are interchangeable, except maybe pistons. Dodge V8s also used the same intake manifold between Hemi and Poly. So a Dodge Hemi intake will fit a Plymouth Poly V8. Hemi and Poly exhaust manifolds are NOT interchangeable. 

In 1956, Dodge increased the stroke (270 to 315 engine) and left the head fit the same, requiring a wider intake manifold for the 315. Hemi and Poly 315 engines use the same intake. When Chrysler increased the stroke from 354 to 392 Hemi engines, they left the intake the same and extended the ports on the 392 heads to reach the old manifold. 

In mid year 1956, Plymouth introduced their own V8 as a 277 and 303. In 57, these became the 318. This is the "A" Series of engines and only a few small parts interchange with Dodge. 

Dave Homstad 
56 Dodge D500 

---- jrawa@xxxxxxx wrote: 
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>  i think the yes may have been that the 260 and 270 polys interchange- i had a 56 savoy with a 270 poly, but in seeing a hemi version of the same engine- i think the hemi intake was narrower- like a 331/354 poly in the years after the respective 331/354 hemis- those are far different.
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> i'd go as far as finding a part number for intake gaskets- just before you buy an intake that may not work- if the ports are the same... perhaps the actual intakes will interchange? if it had a valley to intake gasket like a later small block or chevy/ford engine- the gasket part numbers would be the clincher- since the width of the intake would be denoted in gasket form...
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> -----Original Message-----
> From: Jan & Roger van Hoy <vanhilla@xxxxxxxxxxxx>
> To: L-FORWARDLOOK@xxxxxxxxxxxxx
> Sent: Sun, Feb 7, 2010 7:53 pm
> Subject: Re: [FWDLK] intake manifold '55
> 
> 
> Thanx for the replies.  I have one "yes" with part numbers and one "no."
>  
> --Roger van Hoy
>  
>   
> ----- Original Message ----- 
>   
> From:   Jan &   Roger van Hoy 
>   
> To: L-FORWARDLOOK@xxxxxxxxxxxxx   
>   
> Sent: Sunday, February 07, 2010 7:33   AM
>   
> Subject: [FWDLK] intake manifold '55
>   
> 
> 
>   
> Figure someone out there will know--  Will   an intake manifold from a 260 poly fit a 270 hemi?  The 260 was the '55   only Plymouth version, 270 was '55 Dodge only and 270 poly was used in '55-'56   Dodges and some '56 Plymouths.
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> --Roger van Hoy
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