I'm not sure how hot the turbos run at the track. On my '75 Carrera race car w/3.4 and about 300 h.p. I run 2 fender mounted coolers. A Carrera cooler in the passenger side and a Mocal in the drivers side. I modified the turn signal housings (retaining the turn lights) for better air flow and enclosed the front of the coolers to capture the air (very important) At Buttonwillow with 102 air temp and my wife and I running back to back sessions the engine temp got up to 215-220 when I was running flat out. Cooled to 200-210 when I backed off. I'm not a big fan of front mounted oil coolers as usually that's the first thing you loose when going agricultural.
'75 Carrera RS look w/3.4