Many Caterhams have Vauxhall engines fitted, from 165 to 300BHP and I'm regularly in touch with many of them through the Sevens internet list which I help to administer.
Boostboy is a neighbour and I've just finished doing a mild port on his VX head, he pointed me towards this BBS and it looked interesting. My main area of interest is engine building, more specifically heads, the VX head is a tight design and not dissimilar to the YB Cosworth, hardly surprising I suppose when you see who penned the design.
The VX 16v is a natural choice for a competition engine and there are plenty of them about.
I can still remember Vauxhalls which had dinky OHV engines with siamesed inlet ports..