I haven't made much progress on the J, I've been landscaping the yard and trying to get my shed organised and set up ready to work.
I've received the carburettor from Tim S, and given it a clean up and a check over. It seems to be in reasonable condition and the outside cleaned up pretty well. Its handy to have the banjo bolt and fuel line as well. There is a stripped thread and a missing screw and the spindle bosses on the body may be a little bit worn. I have a set of replacement gaskets on the way from the U.K. Once I get my workshop in order (and find my thread gauges) I should be able to work out what the missing bolt is meant to be like, then I'll be able to repair the stripped thread and replace it. Hopefully I can re-bush the spindle shaft and it will be ready to go.
I also received a nice little descriptive booklet about Solex FAI carburettors with some useful details and tuning and troubleshooting information. It should be quite a useful addition to my reference library. I'll scan it and make copies available to anyone who needs them.
Another piece of reference material I received this week is a document from Lucas published in 1951 with wiring diagrams and electrical test data for Nuffield Group vehicles. It includes both cars and commercial vehicles, and is useful because it allows cross-referencing of the components. Its surprising how simple the J type wiring diagram was in 1951. The booklet is in amazing condition, it shows no signs of ageing and had never been opened before yesterday. Again I'll scan it and make copies available.