these are good fans
http://www.vpw.com.au/Category/Index/511709the 14" has cfm of 1300 low and 1700 high speed 13.8/23 amps
the 17" has cfm of 1725 low and 2100 high speed 17/23.5 amps
I run a plain black davies craig fan
DC-0066 it has cfm of 2010 and 19amp draw. $181 at vpw
I have a custom width radiator which is about 1'5 inch wider than standared and the 16" fan fits with about 10mm to spare
and only has about 10mm clearance from the pulleys.
If i was to buy a new one i would go the hayden fan for better clearance.
oh and i have a strocked 347 with a bit over 400hp and dont have any cooling issues.
sits on about 84deg normally and about 88deg in 30deg plus days