Neil,
In my experience, with the Lucas distributor, a fixture tool is not required. The tool was neccesary on US and Canadian engines, because the distributors used had fixed bodies, the points back plate having to be located in correct position so that when the distributor was bolted back on the engine, it was timed correctly.
With the Lucas one, it is timed by moving the distributor, points can be set up conventionally, I used info from a British Univ. Carrier manual. The Churchill tool could be for the US/Canadian distributors, even then there is a procedure, using a steel rule, that is very effective, if fixture is not available.
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Richard
1943 Bedford QLD lorry - 1941 BSA WM20 m/cycle - 1943 Daimler Scout Car Mk2
Member of MVT, IMPS, MVG of NSW, KVE and AMVCS
KVE President & KVE News Editor
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