I agree that the front mount fan is likely to hurt cooling at speed. It may be needed for low speed heat dissipation for an aggressively driven "street" car. Have to admit that even though I read parts of it during its writing... I do not personally have a copy! Should probably pick one up...
I actually worked for Corky back in 1989-1990 and he described the importance of ducting to me while he was evaluating a top speed RX7 in the shop with a horizontal mount intercooler (parallel to the road)(one of the few packaging options). I was also able to read some of the chapters of...
