Is The 318 Polysphere Mopar Popular?

There are three distinct 'poly' heads: Dodge RedRam; Chrysler Spitfire; and the Plymouth 'A' engine series. No interchanges.
The Chrysler Spitfire head was only used on 331 and 354 in the Windsor and Saratoga models. They will bolt to your 392 block but the intake will be a log-only affair from that point on.

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I had one in an old Dodge once, thought it was a POS...kept fowling plugs. Maybe, I just had a dud

 

I thought I should mention that the earlier ones had the HP. There were 2 plymouth polys, I think 61 & back was one style with a different crank different heads & 3 bolt valve covers. Even the bolt pattern on the trans area was different. They were 277,301 & the 318 performance eng (at least for 57&58) The 62 & up were all 318 mostly 2bbl motors with some exceptions .They had a crank that you could bolt a flex plate to & a newer style trans or bell could be used. These engines had 2 bolt valve covers. They also had lower compression than the previous 318`s. Like I said before ,I couldn`t kill the one I had in My 66 satellite when I was a teenager. It wasnt the fastest cart around ,but reliable & fun for sure.I actually miss that car today.

 

Man, thats a NICE little T bucket. Back in the '70s, when i put a 383 in my '66 Plymouth, I chucked one of those motors, Tossed a lot of stuff I wish I had now, but I barely had space to keep what i kept from those days.

 

Where he has a '63 he can turn down the Mains on a 360 crank &, with a max overbore, have a 402.

 

OH awsome thanks, i was looking at it and it was looking like it would work. i have the chrysler spitfire heads, single shaft design, i love em! i'll post a pic of my plans.

 

Mine has been very popular. Every show folks always wonder what it is... The older MOPAR guys just smile with good memories...