What Motor is this?

[Matt]

I just picked up this barn find off my cousins ranch here in NM. 1961 Plymouth Fury Conv. What motor is this? Soery my pic wont load grrrr.

 

[Matt]

 

[Mr C]

It's a Poly hemispheric ("Poly") V8 mopar. Displacements varied. 318, 354 etc.

 

[65sporty]

Looks like some version of a poly small block

 

[Samplingman]

Looks like an early 318.

 

[Pete Kaczmarski]

looks like the poly 318.......mine was a dog but it is a V8

http://www.lov2xlr8.no/brochures/plymouth/61ply/bilder/23.jpg

check this specs page out..poly 318 had the two valve cover bolts on the top like you have

 

[Matt]

How can i tell for sure?

 

[C Body Bob]

How can i tell for sure?

Casting # on block will tell ya. It should be a 318 Poly, but who knows what was swapped over time

 

[Davea Lux]

I just picked up this barn find off my cousins ranch here in NM. 1961 Plymouth Fury Conv. What motor is this? Soery my pic wont load grrrr.

1961 engine code for 318 poly is located on the LF front face of the block: Will usually be RP2. Fury car serial for 318 poly will be RP2-H. This is the only poly for 1961 that is factory.

Dave

 

[mrfury68]

Pics of the car too please. We like pictures.

 

[twostick]

If the car is unmolested it's a 318 Poly.

If it was a Canadian car it would be a 313 poly. Same engine 3.88 bore instead of 3.91

Kevin

 

[commando1]

If the car is unmolested it's a 318 Poly.

If it was a Canadian car it would be a 313 poly. Same engine 3.88 bore instead of 3.91

Kevin

I wonder why they did that.

 

[300rag]

I wonder why they did that.

Probably the same reason we got Plodges.

 

[Big_John]

If the car is unmolested it's a 318 Poly.

If it was a Canadian car it would be a 313 poly. Same engine 3.88 bore instead of 3.91

Kevin

Wow... Never heard that one.

 

[Matt]

How can i tell for sure?

 

[rags]

here's a question: does it turn? if it doesn't, you have your answer.

 

[Brin Smith]

How can i tell for sure?

Quick and easy way valve covers. Poly motor valve covers are scalloped on the exhaust side. LA motors are straight.

 

[RCB]

It's without a doubt a poly. The valve covers alone make it a poly. As far as what displacement, as the others have said.

They are good motors with a great torque curve. The poly yahoo group is the place for hop ups to this motor. They can be built if one so desires.

 

[sb61fury]

I believe its a poly 318 the same size engine in my '61

 

[Matt]

So I was able to turn the motor with a breaker bar at the crank so I'm going to go ahead an change the oil clean the fuel intake and try and fire her up. This car was parked when running in the 70s and it it marks 65k miles so theres a good chance she will fire up. It will be an interesting thing to try lol