[sideoiler10]

I also have a Shell Vallley with a 427 sideoiler. Had the same problem. Curred it by shrouding the radiator instead of the fans. Such a shroud blocks all the spaces around the radiator where air flow can be forced around the radiator instead of through it. Made all the difference in the world. The two small pushers in front do not hurt air flow at all. I also replaced the rear siingle puller with a 3200 cfm zirgo unit with a manual switch. To be effective, the shroud must completely close off ALL the spaces aroujnd the radiator, incl. the space below and in front of it.

The aluminum shroud was cut and curved and looks sharp with the alum. radiator and fans.