My son will be buying a new water pump for the 360 going in his '77 warlock are there 6 or 8 blade versions still available?I remember this being discussed before but I can't remember which is best?
Wasn't there a heavy duty water pump that was used on police cars back in the 80's?

I got the 8 blade heavy duty 1 for my 340 at NAPA, it was a new 1 and not a rebuilt 1. RONNIE

8 moves more fluid & 6 was used w A/C cause it had a faster pulley ratio (to spin the fan faster to move more air at idle/low speeds cause of the added A/C heat in the condensor) which made up for 2 less blades as Ma thought an 8 would then cavitate at higher rpms w the faster A/C pulley ratio moving the vanes too fast. Use an 8 & tack weld the 5 dollar anticavitation plate on the vanes & you have the best of both worlds.

yes there is a HD cooling one for police cars

8 vanes and a 5/8 shaft larger bearings

it has ribs down the neck,other is like a gatling gun...long tubes down the neck,most times will be a 6 vane

8 vanes non a/c pullys
6 vanes for a/c pullys

both move same x amount of water at idle,8 vane with a/c pully can cause it to cavitate at high rpms(marine engines),ma mopar used 8 vanes on some police cars for the added fan rpms at idle for oil,tranz,PS,rad coolers

they did more idle time/traffic than high speeds like the cruzers

correct size pully help the alt/charging sytems,I have seen cop engines with larger alt pullys before also

Where do you get the anti-cavitation plate?

I run the 6 vein with no issues at all. My temp holds 180-185 in 90 degree weather.

they both will work fine if new or good condition

very seldom do I have a heating problem thats pump related anyway

but have seen some bad things with cavitation on some offshore inbord engines and extended high rpms

Not totally unrelated, but I went from an Iron pump on my 318 to an Aluminum pump on the 360. I now have a pulley alignment issue. The timming cover and accesories are from the 318. How can I fix this? I'm sure I'm not the only person to have had to deal with this.

you will need later model pullys that go with the alum wp

the early iron wp are shorter and have diff pullys

think the timeing marks are on the pass side of the t-cover as well and a later model wp will cover them when mix matched parts are used

any non a/c or a/c later model pullys should straighten it out

not sure about the ps pump and brackets or the alt brakets

they may need to be swaped to the later style also