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




Back