Short Pump vs Long Pump (Again!) - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Stepsides 4Ever · 04-14-2004, 05:36 PM

I've pretty much decided to go for the long water pump conversion due to the fact that there is a lot more later model stuff in our local boneyards than earlier stuff. I've got the truck front end stripped down to the frame so it will be kinda hard to take measurements, but if any of the members have done the conversion on a 350 SBC/4-row radiator, how is the fan/radiator clearance with the 1 3/8" longer water pump? Is there enough room to use a clutch fan, or even an electric puller fan? Pictures would be a great help!

As always, thanks for your help!

**john** · 04-14-2004, 05:52 PM

There is plenty of room with 4 row and long pump with clutch fan. the fan sticks farther into the shroud than needed, so I cut about an inch off of ths shroud and it seems to work okay. Also a BB shroud fits good. John

Mixup · 04-14-2004, 06:29 PM

I did the same thing as John. I cut about an inch off the shroud so the fan blade is about half way in. I have a clutch fan from a late 70's truck, works great.

Stepsides 4Ever · 04-15-2004, 01:26 PM

Many thanks, amigos!

John, you mention that a BB shroud fits good. My truck didn't have a shroud as purchased, so what is the difference between the SBC/BB shrouds?

Also, while on the subject of shrouds, LMC has a listing for a non-A/C shroud and an A/C shroud, with the A/C shroud being $10 less than the non-A/C. At some point down the road, we plan to add A/C, so does anyone know what the difference is between the two?

**john** · 04-15-2004, 06:19 PM

I have no idea what the difference is between A/C and non A/C shrouds. The BB shroud fits a long pump with no alterations as the BB is longer then SB. Here is pic of BB shroud on long pump SB. John

Stepsides 4Ever · 04-16-2004, 04:01 AM

NICE! That is a very clean-looking engine bay, John...

badpeanut · 04-16-2004, 08:16 AM

Quote:

Also, while on the subject of shrouds, LMC has a listing for a non-A/C shroud and an A/C shroud, with the A/C shroud being $10 less than the non-A/C. At some point down the road, we plan to add A/C, so does anyone know what the difference is between the two?

I believe the A/C shroud is shorter (intended for a 4-row radiator, while the non-A/C shroud is longer (intended for a 3-row radiator).

04-14-2004, 05:36 PM	#1
Stepsides 4Ever Stepsides Are Bedder Join Date: Feb 2004 Location: Norco, CA Posts: 238	Short Pump vs Long Pump (Again!) I've pretty much decided to go for the long water pump conversion due to the fact that there is a lot more later model stuff in our local boneyards than earlier stuff. I've got the truck front end stripped down to the frame so it will be kinda hard to take measurements, but if any of the members have done the conversion on a 350 SBC/4-row radiator, how is the fan/radiator clearance with the 1 3/8" longer water pump? Is there enough room to use a clutch fan, or even an electric puller fan? Pictures would be a great help! As always, thanks for your help!

04-14-2004, 05:52 PM	#2
john member #16 Join Date: Dec 1999 Location: Yuba City Ca. Posts: 3,618	There is plenty of room with 4 row and long pump with clutch fan. the fan sticks farther into the shroud than needed, so I cut about an inch off of ths shroud and it seems to work okay. Also a BB shroud fits good. John __________________ john http://67-72chevytrucks.com/vboard/showgroups.php board vendors http://www.flickr.com/photos/1745471...7602865984234/ Last edited by john; 04-14-2004 at 05:55 PM.

04-14-2004, 06:29 PM	#3
Mixup Registered User Join Date: Jan 2002 Location: Henderson, NV Posts: 358	I did the same thing as John. I cut about an inch off the shroud so the fan blade is about half way in. I have a clutch fan from a late 70's truck, works great. __________________ 1980 Chevy Shortbed Pickup 1969 Z28 engine Turbo 350

04-15-2004, 06:19 PM	#5
john member #16 Join Date: Dec 1999 Location: Yuba City Ca. Posts: 3,618	I have no idea what the difference is between A/C and non A/C shrouds. The BB shroud fits a long pump with no alterations as the BB is longer then SB. Here is pic of BB shroud on long pump SB. John __________________ john http://67-72chevytrucks.com/vboard/showgroups.php board vendors http://www.flickr.com/photos/1745471...7602865984234/

04-15-2004, 01:26 PM	#4
Stepsides 4Ever Stepsides Are Bedder Join Date: Feb 2004 Location: Norco, CA Posts: 238	Many thanks, amigos! John, you mention that a BB shroud fits good. My truck didn't have a shroud as purchased, so what is the difference between the SBC/BB shrouds? Also, while on the subject of shrouds, LMC has a listing for a non-A/C shroud and an A/C shroud, with the A/C shroud being $10 less than the non-A/C. At some point down the road, we plan to add A/C, so does anyone know what the difference is between the two?

04-16-2004, 04:01 AM	#6
Stepsides 4Ever Stepsides Are Bedder Join Date: Feb 2004 Location: Norco, CA Posts: 238	NICE! That is a very clean-looking engine bay, John...



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