Re: SV: 1962 Plymouth - 361 or 360?

[Gary Pavlovich <glpavlovich@xxxxxxx>]

Knud-Erik,

Yes, if you would like to go with the Poly 318 I will send you all the 
information and required parts for 350HP, 360HP, or 405+HP with 440torque on 
all packages with the 4" crank.

I presently have a Edelbrock three deuce intake with new Offenhauser 3 to 
4bolt carb adapters if anyone is interested.

Also have the Weiand aluminum dual quad for the Poly but I have promised it 
to one person already; if he changes his mind I will let you know in a 
couple weeks.

Yes, I have all the Poly High Performance camshafts as well.

Gary Pavlovich
----- Original Message ----- 
From: <raybell@xxxxxxxxxxxxxxxxx>
To: <1962to1965mopars@xxxxxxxxxx>; <kebh@xxxxx>
Sent: Wednesday, July 23, 2008 3:22 PM
Subject: Re: SV: 1962 Plymouth - 361 or 360?



Knud-Erik, I'd like to throw in my 2¢ worth...

It's a '62 Plymouth, so the original engines would have been the 361 or
the 318 Poly. Either of those engines is correct, the 360 is not correct.

Either engine will give plenty of performance, especially when aligned
with the 4-speed which was not original... the 3-speed A745 would be the
original transmission, they're cheap if you want to go original, but the
only real benefit is that you don't have to enlarge the transmission
hump in the floor.

Accepting that you have this non-originality in the 4-speed, which
brings with it the tell-tale floor change that wasn't original either,
then the 360 might be reasonable. However, I don't think so.

One benefit of the 360 not mentioned so far is the reduced weight at the
front of the car. However, the Poly, while heavier than a 360, is also
lighter than the 361. This will count when you attack some twisty road
and the car wants to plow straight ahead with the extra weight of the
361 over the front wheels.

The Poly, however, is going to draw a crowd when you open the hood. Not
many people have retained the Poly, even for cars that came with them.
They've been hauled out in droves and replaced by big blocks. So to have
one you'll find it draws its own attention. You'll also find, and Gary
Pavlovich will agree, that it has some nice potential for producing good
torque and power.

They use all the bottom end stuff from an LA, so the bearings, timing
gear, water pump and so on are easily sourced. They do have unique head
gaskets, valve cover gaskets, camshaft and pistons. That said, I believe
pistons from an LA will work in them, I have seen one engine so fitted,
not that I like the idea. If necessary, a fresh flycut in the tops would
make them good enough... or you can readily order them, most makers
still have them.

The downside is the lack of performance inlet manifolds. Weiand stopped
making theirs, Edelbrock haven't made them for ages, but they are
available if you hunt around eBay etc. Or you can join the queue for the
new Air Gap-type of dual plane manifolds I'm planning to be making some
time in the next year or so. I'm even going to make provision in these
for injectors if anyone wants to run EFI.

I believe that a properly planned Poly 318 can readily produce 350hp
with total driveability, more if you go with a stroker, for which cranks
are readily available. Personally, I don't favour that option, though
it's practical. I might feel differently about it in your case if you
could get a 3.58" stroke with the 318 main journals in a forging. Here's
the present options:

1. Forged 4" stroker crank, uses 318 flywheel (internal balance) - $678.67
2. Cast 4" stroker crank, uses 360-type flywheel (external balance) -
$297.50

My views are my views, however. My nephew, who does know his stuff,
would jump on the forged 4" stroker in a heartbeat, and he'd be happy to
use the cast version in a road car too. You would need pistons to suit,
of course, with a higher pin - these are available in both cast and
forged, though flycutting might be needed if you're adapting LA or Ford
pistons. Gary Pavlovich will be able to expand on this.

That will give you greater capacity than either of the engines you're
considering, and you can do that with what is probably a better head,
while the weight of the engine is somewhere in between the two others.

What are your prospects of picking up a Poly 318 in your country? Here
I've been able to locate more than enough of them, though I would never
trust a crank out of a truck version as they get over-revved on steep
descents in low gear and tend to flog themselves to death, breaking the
crank and ripping the main bearing webs out of the block. Same with LA
truck engines.

The best ones would be out of a Case 1010, 1020 or 1060 Combine
Harvester, I don't know if you have those there, but the petrol engined
versions did use the Poly 318 and they never worked hard while they
were, at the same time, probably better castings in the block (I have
been told they were, but I've yet to prove it). These come complete with
a flywheel, by the way!

I'm sending this to both the mailing list and your personal e.mail as I
don't know if my mail gets through to the list. Please let me know if it
does.

Ray


Knud-Erik Holm wrote:
> I want the one with the best power, to my 4-speed man trans.
> I will use the parts I have at hand, and what I can find for small money. 
> I
> have already sunk more than 10000 usd. In the car (incl.car purchase) some
> will come in again when I sell the parts I don't need.
> However I need to stop the money from flying out of my pants for the 
> moment.
> And then the issue, of balancing the flywheel or not? with the crankshaft 
> or
> not?
>
> I am bying parts in USA, Denmark and Sweden.
> -----Oprindelig meddelelse-----


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Please address private mail -- mail of interest to only one person -- directly to that person.  I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic.  Thanks!

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