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  #1  
Old 06-22-2017, 04:49 PM
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Default 1956-57 P29 Poly

The opportunity has come up to purchase a 1956-57 Ply Savoy more door with a Hy-Fire 277 poly and three speed manual that is supposed to be a runner. I think the motor looks really cool and way more interesting looking than a SBC.
Just want to know the pros and cons, if it would make a good motor for the next project and what I should pay for it. I haven't seen the car yet, that will happen next week.
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Old 06-22-2017, 07:56 PM
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Dr Crankenstein Dr Crankenstein is offline
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Boat anchor.

There's little to no support for the early poly, unless you want to spend early hemi money. The bellhousing pattern is also an issue and requires a spendy adapter if you want a "modern" transmission.

That's what I understand. Others (Blue Eyed Devil?) may know better, but I'd pass...

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Old 06-22-2017, 11:13 PM
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I have a Poly motor sitting in the shop, auto tranny. Like the Doc said... hardly any performance parts so you'll need to be satisfied with the stock HP but they do look cool IMO!

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Old 06-23-2017, 03:35 AM
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Quote:
Originally Posted by Dr Crankenstein View Post
Boat anchor.

There's little to no support for the early poly, unless you want to spend early hemi money. The bellhousing pattern is also an issue and requires a spendy adapter if you want a "modern" transmission.

That's what I understand. Others (Blue Eyed Devil?) may know better, but I'd pass...

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Quote:
Originally Posted by Tripper View Post
I have a Poly motor sitting in the shop, auto tranny. Like the Doc said... hardly any performance parts so you'll need to be satisfied with the stock HP but they do look cool IMO!

BoB
That's the info I was looking for, despite the cool looks, I will keep looking
Thanks Guys
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Old 06-23-2017, 07:48 AM
TIMOTHALE TIMOTHALE is offline
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Default More carbs, headers ?

Back in the 50's the "little book" magazines advertized carb adaptors you could use to cut holes in your stock 2 barrel intake to make your own 3- 2 manifold. A few years ago I modified the Corvair combo intake -heads by machineing and adding more intake flanges, then I made a spider leg intake and holly 500 2 barrel . My brother bought the weld it your self intake kit to make a 4 -2 intake for his hemi lakes coupe.
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Old 06-23-2017, 08:22 AM
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Really cool engines and can make some decent power, but be prepared for Mopar sticker shock. Weiand used to make a 3x2 intake, but it has been discontinued and they are getting hard to come by. The Plymouth Poly (not Dodge) is very similar in design to the LA series 318-340-360, other than the heads. If you were actually interested in building one, the later '62-'66 version is the one to have. It takes the standard LA bellhousing for a 727, etc.
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Old 06-23-2017, 10:57 AM
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Just my 2 cents but to me it depends on the price and if it really is a runner, I'd have to hear and see it run first!

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Old 06-24-2017, 05:31 AM
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Thanks for all the info everyone, the asking price is way to high at $1400.
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  #9  
Old 06-24-2017, 12:35 PM
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Quote:
Originally Posted by DozerII View Post
Thanks for all the info everyone, the asking price is way to high at $1400.
WHOA! I bought a good running one with auto tranny for $350! Guy pulled it out of a running '56 Dodge (if I remember correctly) to put in a SBC!

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Old 06-24-2017, 01:00 PM
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The very next rat I build will have a Poly 318 in it, [a '34 Dodge Brothers truck]. Some of the hurdles in front of you using a Poly are, a slightly unique belhousing before 1962, not much aftermarket help, and all of the GM guys whining because you don't want to use a small block Chev. I can help you over those hurdles. One, yes you will have a different belhousing but you already have one on this motor, and a transmission, so you're laughing; two, for aftermarket supplies look up PolySuperPac and find headers, shiny valve covers, camshafts and good stories; and three, I vote for you keeping the GM guys whining a little longer.
I have been saving pre-1962 Chrysler V-8 belhousings so I can outfit an early Hemi or an early Poly. Here is my six-pack intake for a Poly with Stromberg WW's, [the red intake]. Coolness can just bubble off a Poly.
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