Fan clutch thermal or Non thermal for 70 Mopar Slant 6

[Vali68]

been thinking about adding a fan clutch to this slant 6 motor I am rebuilding before putting it back in my 68 valiant. Any pros and cons to adding a fan clutch instead of just the fixed fan it has now. Plus the standard 4 blade fan doesn't seem too efficient to me for cooling this motor.

 

[powerwagonpaul]

I have a 6 blade flex fan if you want to go that route. what part of cali are you?

 

[Vali68]

If a fan clutch and 5-6blade fan will work, That's what i want to go with. Want to keep the motor as cool as possible with enough air flow for it.