Didn't get far enough in my research to find "the best". I found one that works very well, however. Mounts in front of radiator, and has adjustable thermostat so it comes on right at center-scale, and keeps the temps there. Used in conjunction with coolant overflow/recovery tank hiding out where the brake booster used to be. I now fear no parade, drive-thru line, or traffic jam.
I'll journey out in the garage and find the number here shortly. Pretty sure it was from Jegs. Stand by...
Controller is a Derale #16759.
www.derale.com in LA.
Fan is currently not viewable. I think it's an 8" straight blade reversible thin mount from Jegs. Mounts on front because I don't trust the whole engine cooling load to Lucas. Fan mounts with beefy zip ties thru fins in radiator, and I don't think I had to remove the radiator to mount the fan.
Search the site (using Google) for Volvo fan discussions. For Sunbeam engines, I think a revised mount is required, and maybe trimming (?). Not sure. If you don't use Google for the search, it won't find "fan" because the word is too short.
