Steel ruler measuring the intake port on a used cast iron cylind…
A dirty cast iron cylinder head lying on a bench with a General No. 300 steel ruler laid across the intake port face to measure port size. Head bolt holes, machined deck surface and installed spark plugs at the top of the frame are visible in the dim light.
:~- "4 a 2 16 2'0 2: 28 32 8 315 2d 32 ap A? 56 Ha NHI'MW M1112? . | ,H V...
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