5.3 swap power steering - The 1947 - Present Chevrolet & GMC Truck Message Board Network

classic70 · 01-09-2013, 01:08 PM

I am doing a 5.3 swap and I have the 5.3 power steering pump. I currently have manual steering and was wondering what power steering box I need. The truck is a 1970 2wd. Thanks for the help.

C10_ustacould · 01-09-2013, 01:56 PM

A factory style power steering box will do fine. Several ways to go about connecting the lines, I used earls fittings and braided hose, but you could probably have one built at your local parts house.

OldCreek · 01-09-2013, 02:37 PM

Count the splines on your manual box... I don't remember exactly what it is but it is different from the power box splines. It does however, match the spline count from an approx 1978+ power steering box that has matching metric o-ring hydraulic power steering hoses...(I'm not positive on the year Chevy switched from flare fittings to o-ring.)

Therefor, you can use your stock rag joint and buy stock power steering hoses (from that same 78+ truck.)

That's what I did on my '72 5.3 conversion.

brad_man_72 · 01-10-2013, 10:59 AM

If you use a stock box you can use a factory 68-72 power steering hoses, if you pull the fitting the hose screws into out of an 68-72 power steering pump and replace the fitting on the back of your 5.3 pump.
This way you can get replacement parts at any parts store and it looks factory.
Posted via Mobile Device

bbadfred · 01-10-2013, 11:09 AM

My 67 GMC had 81 power steering and brakes when I got it in 97 and I used the stock hoses from the 04 truck LQ9 with a metric fitting for the 81 power steering box.

classic70 · 01-10-2013, 12:19 PM

Ok thanks for all the help guys.

01-09-2013, 01:08 PM	#1
classic70 Registered User Join Date: Jun 2009 Location: Columbus IN Posts: 91	5.3 swap power steering I am doing a 5.3 swap and I have the 5.3 power steering pump. I currently have manual steering and was wondering what power steering box I need. The truck is a 1970 2wd. Thanks for the help.

01-09-2013, 01:56 PM	#2
C10_ustacould A day late and $1 short... Join Date: Dec 2008 Location: Northwest FL Posts: 3,870	Re: 5.3 swap power steering A factory style power steering box will do fine. Several ways to go about connecting the lines, I used earls fittings and braided hose, but you could probably have one built at your local parts house. __________________ Buck Instagram: C10_ustacould 1963 SWB Fleet Side 528 Desert Beige Milly 1967 SWB Step Side 506 Medium Blue The Old Girl 1968 SWB Fleet Side 503 Light Green Ellie SOLD 1965 SWB Fleet Side 507 Light Blue Prescription Strength SOLD 1971 SWB Fleet Side 521 White Shiro SOLD 1968 SWB Step Side 503 Light Green My Old Farm Truck SOLD

01-09-2013, 02:37 PM	#3
OldCreek Registered User Join Date: Jan 2007 Location: Central Coast California Posts: 1,026	Re: 5.3 swap power steering Count the splines on your manual box... I don't remember exactly what it is but it is different from the power box splines. It does however, match the spline count from an approx 1978+ power steering box that has matching metric o-ring hydraulic power steering hoses...(I'm not positive on the year Chevy switched from flare fittings to o-ring.) Therefor, you can use your stock rag joint and buy stock power steering hoses (from that same 78+ truck.) That's what I did on my '72 5.3 conversion. __________________ 1972 K20 Suburban 5.7/700r4/NP205 Dana 44/H052 Sold 1972 C10 5.3L/4L60E 12bolt 5Lug - Sold 1971 K5 Blazer 6.0L LQ9 4L60E NP205 Dana 44/H052!!! 1970 K3500 1ton CrewCab 8.1L/Allison1000/NP205 Dana 60/14B!!!! - Sold 1984 K10 SWB 7.4L/4L80e/NP208 Corp 10/12 bolt Sold 1988 V30 CCLB 7.4L/TH400/NP205/Dana 60/Dana 70/3.73!!! (Sold) 2003 K2500HD 8.1/Allison1000/NP263

01-10-2013, 10:59 AM	#4
brad_man_72 the boat guy Join Date: Jul 2007 Location: springfield mo Posts: 2,339	Re: 5.3 swap power steering If you use a stock box you can use a factory 68-72 power steering hoses, if you pull the fitting the hose screws into out of an 68-72 power steering pump and replace the fitting on the back of your 5.3 pump. This way you can get replacement parts at any parts store and it looks factory. Posted via Mobile Device __________________ 67, swb, fleet, tach, throttle, 5.3, 4l60e, 3.73's, fuel cell, 5 lug, p.d.b., 4-6 drop. great little truck 66, stevens drag/ski 18' silouette, 350, 2.02 doublehump heads. comp extreme marine 278 cam, vette 7 fin valve covers, old polished edelbrock intake, velvetdrive, casale v-drive, adj cavitation plate. 28, model a rpu project,

01-10-2013, 11:09 AM	#5
bbadfred bbadfred Join Date: Mar 2008 Location: rantoul Il Posts: 461	Re: 5.3 swap power steering My 67 GMC had 81 power steering and brakes when I got it in 97 and I used the stock hoses from the 04 truck LQ9 with a metric fitting for the 81 power steering box.

01-10-2013, 12:19 PM	#6
classic70 Registered User Join Date: Jun 2009 Location: Columbus IN Posts: 91	Re: 5.3 swap power steering Ok thanks for all the help guys.



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.