Yes forget v8's in escorts as too big unlesss building a space frame type machine . A good fast turbo 2 litre installation is still not cheap Sambo . Just the Atlas axle is 2500 pounds alone if rebuilt to new . Then for a track car you don't need a big turbo (400 plus bhp etc) you need a small responsive turbo to go faster around the corners and too pick up fast when you come off the brakes etc . An engine like this will still cost a few quid if building new with all quality parts , gearbox , shell fabrication , intercoolers , axles etc etc . Even then it will still have decent pintos , N/A cosworths , XE's , etc etc sitting close to it's back panel or dare i say it , in front !