It is very important to choose the right radiator cap and recovery tank to complement your cooling system. You may also need a special fitting, bolt kit, or even a bracket to make your installation a pleasure and not an unhappy memory.
Billet radiator caps rated at 13 p.s.i. are recommended for all Be Cool radiators. Water boils at 212°F, so a (cool) rule to remember on cap pressure is that for every added pound of pressure the boiling point of coolant raises three degrees.
A proper size coolant recovery tank is recommended and also environmentally safer than an overflow tank. Be Cool has many models, with or without filler necks, to choose from.
To help you with your electric fan conversion there are many styles of brackets with hardware available for a trouble free installation and many for specific applications without the need for major modifications.