Water pump length?

[OL SKOOL]

I'm getting ready to order my vintage a/c system. One of the questions they ask is long or short water pump? The engine is a 1984 400 sbc all stock. Any way to tell what water pump I have? Thanks

[geezer#99]

Yup!
Short pump has no room (maybe 1/4 inch) between it and the timing cover.
Long pump has room to poke your fingers in there (almost).

[OL SKOOL]

Thank you geezer I will go out right now and check. I got pretty pudgy fingers though .

[geezer#99]

I meant normal people! LOL!
You’ll see the difference easily.

[OL SKOOL]

Now I gotta be normal? 66 years in the rear view mirror never been too normal. But all kiddin aside I have a short water pump. Thanks again for the quick come back. I will order my Vintage Air and at least be cool.

[geezer#99]

Just to be on the safe side. Post a pic.
Maybe your 66 year old eyeballs are no better than my 68 year old ones.

[demian5]

Originally Posted by OL SKOOL

Now I gotta be normal? 66 years in the rear view mirror never been too normal. But all kiddin aside I have a short water pump. Thanks again for the quick come back. I will order my Vintage Air and at least be cool.

Post a picture man. I wouldn't think an 84 would have a short pump.

[OL SKOOL]

I take terrible pics not much light in the garage where engine sits.See if that helps at all

[geezer#99]

Looks long to me.
You can measure them too.
Long is 7 1/4 inches from block to fan mount.
Short is about 5 1/2 inches.
And your alternator won’t fit on that side with a short pump.

[tdangle]

this might help:

[OL SKOOL]

Thanks for all the info I will go out in the morning and measure. Looks like that comparison pictures of the S.B. water pumps I have that blocked port on the back also. I do believe maybe a long shaft then. I'm going to put the alt. on the driver side where it belongs for my truck. Thanks tdangle for the pic and demian5 for questioning it.Geezer I told you my fingers are pudgy!