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How to identify cylinder head compression ratios - Studebaker Engines

Keep in mind this table is for stock applications. Some additional information that is helpful is the CC size of the cylinder head.

Here is a list of V-8 cylinder heads by CC size
#537555, 54.5cc 1955-1961 motors
#1557570 54.5 cc 1963-1964 R-1 motors
#1555294 56.5 1962 motors only
#535976 58.0 cc 1956-1960 motors
#1557582 67.1 cc 1962-1964 R-2 and 1961-1964 truck motors
Engine type Part # Casting # Location Ratio Gasket
"L" Head 1549218 1549218 Right Center 8.0-1
"L" Head 1548294 1548294 Right Center 7.0-1
OHV Head 1561582 none none 8.0-1 1558948
V8 537571 537555 Outside Center 8.0-1
8.5-1
535982
1545072
V8 536097 535976 Outside Center 7.5-1
V8 536790 Use 1557580 7.0-1
V8 1555295 1555294 Outside Center 8.25-1 1545072
V8 1557580 1557582 Outside Center 7.0-1
7.5-1
535982
1545072
V8 15557571 1557570 Outside Center 9.5-1
10.25-1
535982
1545072
V8 1557579 1557581 Outside Center 8.0-1
8.5-1
535982
1545072
OHV 1561582 none none 8.5-1 1550608
Note: Gasket 535982 is .050 thick and gasket 1545072 is .020 thick