I have a pile of bits and a master plan lol. two cars to build, an S1 (minty & polished )and a XR3 to be RWD (owned this XR3 20 years)

So with plenty of time spent building toy cars for peeps with dough, I've picked up a few tricks.

For the effort to go WRC rear while building the shell it's a far better proposition IMHO.
Gets the weight locked in tight and low down.

That said a proper axle set up like like the old Mk2 can work so well the more modern stuff is not strictly needed on this sort of build IMHO... but I'm still doing it WRC cos I'm a F'in badass

I know how to build a chassis that works with the MK3/4 I've been watching plenty at the shows & trackdays and bothering owners for years at meets