The crank does make two turns for every one of the distributor shaft turns.
Therefore, the TDC on your crank can be either (on a Chev V8) cylinder #1 or
#6. You need to use your thumb over the spark plug hole to determine which is
coming up on compression as you turn the crank, and line the distributor to
fire the correct distributor. What they mean by 180 out is sort of a misnomer,
refers to the distributor but is based on the crank scale so it is really 360
degrees out as a total engine cycle is two crank turns, or 720 degrees. Clear
as mud?
I found out through trial and error, that the camshaft installation where you
line up the dots on the crank & cam gears results in the engine being ready to
fire #6. This is assuming the dots are closest together for easiest
alignment, the crank gear dot towards the top, the cam gear dot towards the
bottom.
Sandy Pierce
Salt Lake City, Utah
55-2 GMC Suburban P/U
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