In answer to Mike Tobin's questions:
The AH 3000 Mk-I was produced from 1959-1961.
The AH 3000 Mk-II was produced from 1961-1962
The Mk-I and Mk-II both had the BN7, BJ7 designations. The BN7 represents
the so-called "roadster version with it's - what I call "bolt-on" side-
curtains, and the BT7 designation represents the "convertible" version
with it's roll-up windows.
In March 1961, some models were fitted with the "Tri-carb" HS4 setup.
Thus, the tri-carb setup may be on a Mk-II AH-3000.
In (June?) 1962 the BN7, BT7 production was discontinued and the BJ7
was introduced - still as a Mk-II model. The BJ7 & BJ8 of course were
both convertible versions.
No tri-carb BJ7, BJ8 versions were produced.
There is much overlap (obviously) of model and chassis designations as
well as parts on the cars. Big question at many concours judging is
" what is original?" on a Healey. to get specific, chassis & production
dates are considered.
The new book: Original Austin Healey by Anders Clausager is a good book
which provides much detail/photos/dates/etc.
Happy Healeying.....
Duane Walzer (1955 Austin Healey 100-4 BN1)
(Mine is a late BN1 with reflector pods on back as
was standard on 100-4 BN2 models.)
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