Looking for advice on how to add or fix my fan problem.

[42_NATO]

Well my 65 has a 350 in it and starts over heating after driving a while only when im at a stop or moving slowly . ive made the conclusion that since i dont have an engine shroud. The water pump fan isnt pulling enough air from the radiator. So i was looking into buying the shroud but new there running 130.00 . i also looked into just adding a fan or two.

I have a fan from a previous car that should work . so should i just add that fan on a toggle switch .

Or should i buy the temp sensor and relays for the fan and remove the old water pump fan.

Or should i just buy the shroud.