Hi all
Blumbly, I guess you're talking about the VK30 4-stroke (not the Villiers tank above).
The tank from the Turner (Coronet) was the standard VK30 tank of the early and mid '60s.
I'm guessing that by 1968 there was a more streamlined version offered by Kirby that SB
used on the
490409 (with VK 30).
I've seen this newer-looking tank on other brands as well.
This is the machine you are re-creating ...
[Note: the tank slopes from from to back; also chrome cover for trip release]
The aircleaner - I believe - will be the same as displayed in the
brochure in the Record for the 49 with Villiers 2-stroke (Pope used them as well).
Hope this helps.-------------------------
JACK