To: The 1962 to 1965 Mopar Mail List Clubhouse <1962to1965mopars@xxxxxxxxxxxxxxxx>
Their are several versions of the poly engines. Poly refers to the
shape of the head combustion chamber design. Some of the Chrysler and
dodge hemis used the same blocks as their poly counterparts. Just
making the Hemi heads fit engines they already had. ..............MO
On Jul 20, 6:08 am, Bill Paxton <w...@xxxxxxxxxxxx> wrote:
> What is the difference between the polys? Why can some use hemi heads and the
318 version can't?
>
> There are many versions of the poly engine. Poly refers to the shape of the
heads combustion chamber design
>
> -----Original Message-----
> From: 1962to1965mopars@xxxxxxxxxxxxxxxx [mailto:1962to1965mopars@xxxxxxxxxxxxxxxx]
On Behalf Of Gary H.
> Sent: Wednesday, July 18, 2012 8:14 PM
> To: 1962to1965mopars@xxxxxxxxxxxxxxxx
> Subject: Re: OT 354 poly
>
> Yes. Not all polys convert though. "Chrysler's 301, 331, and 354 polys and
Dodge's 270, 315 and 325 polys can easily be converted to hemis by adding the
proper heads, intake and exhaust manifolds. It is important to understand that
polys can be converted to hemis only within an engine family. Chrysler polys
accept Chrysler hemi heads, Dodge and early Plymouth polys will accept Dodge
hemi heads. DeSoto never produced a poly head motor so DeSoto hemi heads won't
work on anything but a DeSoto hemi. (The 325 ci. Firesweep Poly head motor
installed in some 1957 DeSotos were actually Dodge motors built in the Dodge
engine plant.)"http://www.hotrodsandhemis.com/poly.html
>
> So the 318 Poly family of A engines had no Hemi motor based on it. So Hemi
heads would not fit those polys.
>
> Thanks,
> Gary H.
> > -------Original Message-------
> > From: John Knox
> > I wasn't too clear. The early Hemi had a different bellhousing bolt
> > pattern than a big block.
>
> > On Jul 18, 2012 6:44 PM, "John Knox" wrote:
> > The 354 poly motor used the same bellhousing as the Chrysler Hemi. And
> > indeed,you could turn the poly into a Hemi; my father did just that for his
> > AA/FA.
>
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Please address private email -- email of interest to only one person -- directly
to that person. That is, email your parts/car transactions and negotiations, as
well as other personal messages, only to the intended recipient. Do not just
press "reply" and send your email to everyone using the general '62-'65
Clubhouse public email address. This practice will protect your privacy, reduce
the total volume of mail and fine-tune the content signal to Mopar topic.
Thanks!
1962 to 1965 Mopar Clubhouse Discussion Guidelines:
http://www.1962to1965mopar.ornocar.org/mletiq.html and http://www.1962to1965mopar.ornocar.com/general_disclaimer.html.
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