the VK won again in Group A touring car racing Mike O'Brien won a round of the BTCC at Snetterton later on in 1987 at the wheel of a VK Group A Commodore (the ex-Allan Grice VK from his 1986 ETCC campaign)

Unless I am mistaken, this was the last ever race win by a VK Group A SS Commodore in touring car racing.

I'd say that would be correct.