I've done a search, but can't find how many cfm's the mechanical fan puts out. I understand it is variable due to the clutch, but I'm guessing it has a max rating at some rpm? If that info doesn't exist, what is the minimum cfm I should look at for electric? Does size matter vs cfm? flex-a-lite says that the general rule of thumb is to cover a minimum of 70% of the radiator. I bought a 16in 2500cfm but was really only guessing as I could not find the answer i was looking for.
Note, I will also be sending in my alt in for an amp upgrade.

'88 Raider. 2.6L dead...2.4L swap in progress, AT, 33's, 2 bouncy seat,AC, CC, 2.25 exh, 2" Tbar, 2" BL, rear DB, rear LSD,4.90's, SW hubs,gen2 uca's, KYB shocks, snorkel, elec fan, MSD.

'99 chev k3500 crewcab
'15 Subaru XV
'03 BMW i325