The alloy bellhousing was fitted to late 948cc Heralds from mid 1960, and to
early 1200 Heralds until late 1962. They were fitted to very early Mk1
Spitfires only - I have seen no more than a handful on Spitfires here in the
UK (as an original fitment - I know of plenty which have been converted).
Incidentally, the earliest Heralds had a one-piece cast alloy
gearbox housing with integral bellhousing. This was internally the same as
the 3-synchro 3-rail box. Has anyone considered one of these in a race
Spitfire? They are incredibly light, but I don't know if an overdrive
mainshaft can be fitted. I understand the early clutch is also necessary.
Food for thought.....
Bill Davies.
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