Just looking at these pictures of the T34 I'm noticing a couple of things, the position of the radiators for a start. On a modern F1 car the radiators are force fed through the side pods of the chassis. You can see above where these radiators just lie flush with the bodywork running parralel to the NS axis of the engine. It seems like an odd thing to do as the cars forward motion wouldn't seem to have much effect on the amount of air being fed through to cool the engine.