Thread: fan pulley clearance sbc with picture

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I have attached a picture of a 1985 small block 305 in my model A chassis, on the roadster pickup I am building. I have installed a short nosed waterpump, however, I am going to have to remove that humoungus stock crank pulley, and hopefully source a crank pulley that will bolt on in its place. The replacement pulley which I bolt on will have to have a v-belt groove very close to the engine side, in order for it to line up with the short nosed waterpump v-groove pulley (not shown in this picture). When I do this, the alternator will have to have the multi groove pulley swapped out for a v style pulley, and will have to move back so far that the rear of the alternator will hit the front of my valve cover, unless I change the alternator support bracket system. (the current system consists of the stock bracket plus a bracket I made which extends over to the drivers side cylinder head, because when a short nosed waterpump is bolted on, you lose a threaded hole which was in the long nosed pump.--- I need the clearance provided by using a short nosed waterpump, to fit an electric fan between it and the radiator. I do not want to spend big dollars buying special aftermarket pulleys. Does anyone have a practical solution to this dilema, as in what year and make/model might be available in wrecking yards to fix these clearance issues? Also, does anyone have a picture of their alternator support bracketry used with a short waterpump and v-style pulley? Thank you in advance for any help you can give.

Brian,

Look for a 1955 - 68 Chevy smallblock with no air conditioning or power steering. I think that's the last year for short waterpumps.

I built my own brackets for my A-bone. This is a big block, and the photo isn't too good, but you should get the idea. It's just a flat plate bolted to the head, some small diameter rod in front for the braces, and a through-bolt with a spacer to line up the belt. The adjustment was via a rod with clevises bolted to the other head - which unfortunately doesn't show up in this photo.

Hope this helps.

Henry Rifle---thanks a lot, that answers pretty well the whole question. Brian

Henry Rifle, Nice innovation! Thanks from me too!

Don Shillady
Retired Scientist/teen rodder

Thanks guys,

But, oops. LH and RH rod ends with jam nuts - not clevises.

Streets,

How 'bout an inverter in the garage . . . and a really, reallly long extension cord? No brackets required.

Shoot me your email address and I can send you a picture. One thing to watch out for is the camaro you used with the serpentine assembly has a reverse rotation water pump. You need to make sure everythng is matched.

Doug

Doug---I don't know what your email address is, and I see that you do not wish to receive emails thru this website, according to your profile. Also, I don't know what you are talking about re: Camaro---who said anything about a Camaro?

Brian Rupnow

I will send you and email. I don't know how to post pictures here. I assumed your 85 SB 305 was from a Camaro, I thought thats when they started that pulley system. That is the same motor In the 23 I am buying. I went through the same things you are doing on a second gen Camaro.

Doug

Doug