i need info on what type & size of electric fan i will need for a 318 plymouth in a 47 desoto conv thanks

Check out the earlier posts on "temperature".
Are you going to run A/C or not?
If so I found that a 16" puller behind the radiator with a 10" pusher in front of the condenser or radiator works just great. Now running about 195 degrres with a 195 degree t-stat and about 85 degrees ambient temp. AT first I had the small fan only running when the A/C was on but that didn't work out as well as both fans running at the same time off the thermostatic fan switch set to go on at 200 degrees and off at 185.
Small block Chrysler should have about the same cooling requirements as a small block Chevy. My two cents or as they say in Swede, "my tre orr"

i am not running ac. am using stock radiator and have no room for a puller fan of any size because engine sits pretty low in compartment. is there any size pusher fan that would do the job thanks

Suggest trying an 18" pusher rated at 2700+ CFM

I called perma-cool and they have a 16" fan rated at 2700 mounts thru radiator. On my 1930 the fan is 3/8"from radiator and the back of the fan blade misses the water pump pulley by 1/4" so it is tight but it really works. I had to change a little on the fan frame but it has nothing to do with the fan it's self just the mounting
Dr. Pepper

could you tell me where you got your fan and the cost, was it direct from permacool or through another source thanks