Your thinking of the IHC SV line. The numbering I gave came right from a Ford service manual for this engine. The SV IHC's were timed off #8 IIRCIIRC this engine is backwards in that the forwardmost cylinder is not #1. This threw me for a loop one time when I had to figure out where the plug wires go. Eventually I had to remove the valve covers and spark plugs and put wires in the cylinders and watch the valve gear go, from then I could interpret the firing order.
In shop class they told us the forward cylinder was always #1, well not on this engine.
Lots of European Mfg number from the flywheel end.