You are right about my spec changes, the problem as I see it with modified cars is that life is always a compromise. Manufacturers now spend millions of pounds developing cars to make them easy to live with. I want my Pug to be great to just jump in and drive all the time...at the moment I cannot as there are things that niggle me.
The shell is much smaller than a Sierra or Escos, not just shorter, it is much thinner so packaging is hard. for example the track width caused me a night mare, it was running huge camber (like over 2.5 degrees neg) just to get the front wheels tucked in the top of the arches, that was daft on a road car and after trying lots of different things I went with the WRC front to allow me to put the wheels where I wanted them.
The 6 degree beam improved the car massively but I would still like to tuck the wheels where I want them and as my coilover strut towards are basic to say the least and by doing a Cradle I can run front shox on the rear and have proper adjustment and get the track how I want it.
I expect my spec will move many more times yet.
The big engine is actually a cost effective way of avoiding a rebuild, my stock engine is pretty good but ideally I want head work, cams and long studs by the time I put some pistons in it and a crank it is easier to sell mine and buy the new one.