i built a 4x4 yars ago,
even got 15 mondeo steel rims and trims on it, was i right laugh
had a t34 and greys, looked totaly standard
hardest part was modding te tunnel and front legs because i made it 4x4
but if your sticking with rwd then it'll all just bolt straight up(front end)
i just used the original car loom and patched in the cosworth engine loom
as for the back end, i got some coil overs made for the back to keep the original suspension
and the exhaust needed to be cut up and rewelded a bit to clear the differant suspension
but generaly realy easy to do
had it up crail couple times, used to run 12s passes, wasnt bad for a standard looking sierra estate,
should have kept it, was great fun