[Scarebird]

In my 1971 LeMans L84 conversion, the norm is to run an aluminum radiator with a pair of electric cooling fans. Bollocks.

I find the old school thermostatic clutch fan dead reliable and very simple, looks period correct and confuses "experts". Note to mention it is one less thing to go gunnybags!
I noted on my 2020 5.3 crate motor that the water pump had a threaded section - this intrigued me.
Measurements show it to be a M30-1.5 thread. Why? it served no purpose in installation and as far as I can see no use in rebuilding the pump. By dumb luck I noted in a youtube video that a Ford Ranger had the same thing. The water pump seemed suspiciously centered in the radiator shroud too... this is the pump: GM 12687631

no way the thread and pitch are the same...






Way. I ordered a HD blade section and clutch - it fit perfectly.

I will need to notch the fan blades a bit and shorten the air intake elbow but this is easily doable. Part application is 1990-2011 Ranger 4.0 w/ HD cooling.