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Engine Serial Number 120-130 1967

posted by  Phil S. on  Sat Mar 29 13:40 CST 2003
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last visit: Fri Oct 24 13:18 CST 2014
[RELATED]

I never made sense out of the numbers, but it's not the block that determines the engine type. It's the head and camshaft.

Carbureted B20s:
All the same head casting, but with three compression ratios ranging from 8.71 - 9.5:1. 42mm intake valves, 35mm exhaust valves.
B20A has the A cam, used mostly auto-transmission cars.
B20B has the C cam.

Injected B20s:
All have the D cam, heads with 44mm intakes and 35mm exhausts.
B20E has a 10.5:1 CR head.
B20F has a 8.7:1 CR head.

(The E and F heads are different castings -- you cannot take .080" off the F head and make it an E head.)

Note: Not sold in the U.S. but in Canada and other markets, there's a carburetor F head. It's the same as the FI version, but without injector ports or openings for D-jet fittings.






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