BB P/s pump question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

HeavyD · 02-08-2005, 02:11 AM

This is for anyone who has swapped in a big block: On original trucks I see a power steering reservoir used, but is this necessary when swapping in a 454 from a mid 70's truck? What did the later trucks use? Thanks.

**kwmech** · 02-08-2005, 02:24 AM

The earlier trucks used the short water pump which did not allow room for the reservoir and filler neck, the later models had the longer pump.

HeavyD · 02-08-2005, 02:34 AM

So if I use a long water pump I can use a regular pump that will resemble a set up like a 350 would have? Thanks.

**kwmech** · 02-08-2005, 02:44 AM

Close, the longer water pumps have the alternator on the pass side and the AC above the PS pump, so if you have AC it requires a little bit different pump reservoir that tips forward of the AC bracket that bolts to the front of the head.

HeavyD · 02-08-2005, 02:55 AM

There will be no A/C on this truck. So, I guess I am asking can I just take the complete mid 70's 454 truck engine and drop it into the 70 GMC I have?

Tx Firefighter · 02-08-2005, 10:00 AM

Sure, why not?

It's all together and working in the later model truck. What truck it's bolted in to shouldn't affect anything. As long as you use everything as a matched set of pulleys and brackets off the later model truck.

Bob Moore · 02-08-2005, 01:52 PM

I installed a 454 with a long pump setup - alt. on pass side and power steering. I used 72 BB motor mounts so motor is in stock location. I have very little space between the fan and the 4 core radiator. This set up is using a clutch fan and the clearance is TIGHT.

Without the clutch fan you will have more clearance but I recommend the short pump if you can swing it.

02-08-2005, 02:11 AM	#1
HeavyD Senior Member Join Date: Sep 2004 Location: Wakaw, Sask, Canada Posts: 3,180	BB P/s pump question This is for anyone who has swapped in a big block: On original trucks I see a power steering reservoir used, but is this necessary when swapping in a 454 from a mid 70's truck? What did the later trucks use? Thanks. __________________ "You can take the man out of PA, but you can't take PA out of the man"

02-08-2005, 02:34 AM	#3
HeavyD Senior Member Join Date: Sep 2004 Location: Wakaw, Sask, Canada Posts: 3,180	So if I use a long water pump I can use a regular pump that will resemble a set up like a 350 would have? Thanks. __________________ "You can take the man out of PA, but you can't take PA out of the man"

02-08-2005, 02:55 AM	#5
HeavyD Senior Member Join Date: Sep 2004 Location: Wakaw, Sask, Canada Posts: 3,180	There will be no A/C on this truck. So, I guess I am asking can I just take the complete mid 70's 454 truck engine and drop it into the 70 GMC I have? __________________ "You can take the man out of PA, but you can't take PA out of the man"

02-08-2005, 10:00 AM	#6
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	Sure, why not? It's all together and working in the later model truck. What truck it's bolted in to shouldn't affect anything. As long as you use everything as a matched set of pulleys and brackets off the later model truck. __________________ I'm on the Instagram- @Gearhead_Kevin

02-08-2005, 01:52 PM	#7
Bob Moore Registered User Join Date: Feb 2004 Location: Tacoma WA Posts: 1,365	BB with Long WP I installed a 454 with a long pump setup - alt. on pass side and power steering. I used 72 BB motor mounts so motor is in stock location. I have very little space between the fan and the 4 core radiator. This set up is using a clutch fan and the clearance is TIGHT. Without the clutch fan you will have more clearance but I recommend the short pump if you can swing it. __________________ 67 C-20 LWB, tilt, speed alert, vac, 454, T400 67 C-10 SWB, factory air with more to follow

02-08-2005, 02:24 AM	#2
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,641	The earlier trucks used the short water pump which did not allow room for the reservoir and filler neck, the later models had the longer pump.

02-08-2005, 02:44 AM	#4
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,641	Close, the longer water pumps have the alternator on the pass side and the AC above the PS pump, so if you have AC it requires a little bit different pump reservoir that tips forward of the AC bracket that bolts to the front of the head.

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