What race series to enter

[Mark A S]

Question for you all, I am thinking of having another go at a bit of circuit racing after a few years of rallying as I fancy a change.

What would be the best series to enter my 1979 Mk 2 in ?
It has a 2.3 XE engine, and Sadev sequential G box, apart from that it is normal Gp 4 Escort rally spec.

Thanks in advance.

[Mark A S]

Thanks everyone, the Quaife series looks favourite