Early Poly Head Identification Chart
New generation "A" series Poly head motors are not included
in this chart since they have little in common with the early hemi.
Eng# |
  |
Year |
  |
Name/Make |
  |
CI |
  |
Comp |
  |
HP |
WE55 |
  |
1955 |
  |
Chrysler |
  |
301 |
  |
8.5:1 |
  |
188 |
WE56 |
  |
1956 |
  |
Chrysler |
  |
331 |
  |
8.5:1/9:1 |
  |
225/350 |
LE57 |
  |
1957 |
  |
Chrysler |
  |
354 |
  |
9.25:1 |
  |
295 |
58S |
  |
1958 |
  |
Chrysler |
  |
354 |
  |
10:1 |
  |
310 |
58W |
  |
1958 |
  |
Chrysler |
  |
354 |
  |
10:1 |
  |
290 |
Eng# |
  |
Year |
  |
Name/Make |
  |
CI |
  |
Comp |
  |
HP |
VT-334,336,338 |
  |
1954 |
  |
Dodge |
  |
241 |
  |
N/A |
  |
N/A |
VT-434,436,438 |
  |
1955 |
  |
Dodge |
  |
259 |
  |
N/A |
  |
N/A |
D55 |
  |
1955 |
  |
Dodge |
  |
270 |
  |
7.6:1 |
  |
240 |
D63-1 |
  |
1956 |
  |
Dodge |
  |
270 |
  |
8:1 |
  |
189 |
D63-2,D63-3 |
  |
1956 |
  |
Dodge |
  |
315 |
  |
8:1 |
  |
218/230 |
VT-534,536,538 |
  |
1957 |
  |
Dodge |
  |
315 |
  |
N/A |
  |
N/A |
KDS |
  |
1957 |
  |
Dodge |
  |
325 |
  |
8.5:1 |
  |
310 |
L325/LD2 |
  |
1958 |
  |
Dodge |
  |
325 |
  |
9:1 |
  |
252/265 |
L8-D1,D2,D6,WS |
  |
1958 |
  |
Dodge |
  |
315 |
  |
N/A |
  |
N/A |
Eng# |
  |
Year |
  |
Name/Make |
  |
CI |
  |
Comp |
  |
HP |
P27 |
  |
1955 |
  |
Plymouth |
  |
241 |
  |
7.6:1 |
  |
157 |
P27 |
  |
1955 |
  |
Plymouth |
  |
259 |
  |
7.6:1 |
  |
167/177 |
P28 |
  |
1956 |
  |
Plymouth |
  |
270 |
  |
8:1 |
  |
180 |
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