Exhaust Manifolds - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Primer70 · 08-20-2009, 02:00 PM

I have a 350 engine out of a 1991 K1500 pickup ( newer body style 4X4 truck ) that I'm gonna put this engine in my 2wd 73 Suburban. I'm wanting to know if anybody knows if the 1991 stock exhaust manifolds will fit between the 73 frame. I've measured & it looks close.

Primer70 · 08-20-2009, 02:06 PM

I have a 350 engine out of a 1991 K1500 pickup ( newer body style 4X4 truck ) that I'm gonna put this engine in my 2wd 73 Suburban. I'm wanting to know if anybody knows if the 1991 stock exhaust manifolds will fit between the 73 frame. I've measured & it looks close.

Driveway Dreams · 08-20-2009, 10:54 PM

I don't see why they wouldn't. Why are you using the manifolds from that motor? If they are too wide, you can probably find another set from a 350 that may be a little tighter. Or, if you have the money, a set of headers built to the rig would be awesome.

**Captainfab** · 08-20-2009, 11:03 PM

I can't say for certain, but I don't think they'll work without cutting the frame. I've heard of a couple of guys having issues with the newer manifolds in the '63-'72 trucks, which have the same width frames. It may be easier to use the manifolds from the '73 and weld in the bung for the O2 in the exhaust pipe. That is if you're running the TBI.

f.monroe · 08-20-2009, 11:10 PM

I had a newer engine in a 74 I had around 92 or so . I used the later manifolds and the driver side is real close . I remember using a brass plug in the O2 sensor hole and there may have been 1/8 inch clearance . I clearanced the frame about an 1/8 inch and it was fine . I remember the passenger side being fine .
Frank

Primer70 · 08-21-2009, 12:31 AM

Driveway Dreams, I have headers on the truck now. The old headers are rusted though, leaking & hang down too low. I'm just tired of having to fix header leaks, and the engine is bone stock.

Thanks f.monroe. That's what I wanted to know. Did you use the engine accessories from the newer engine? I'm also concerned that the newer power steering pump uses a metric threaded pressure hose that may not work with my older steering box. I know there was a change in the steering boxes, but I don't know exactly what the changes were.

Primer70 · 08-22-2009, 02:47 AM

Decided to go with earlier style exhaust manifolds. A buddy of mine had a set laying around in his shed.

Primer70 · 08-22-2009, 02:50 AM

Decided to go with earlier style exhaust manifolds. A buddy of mine had a set laying around in his shed.

I'm not keeping the TPI, but I am keeping the serpentine belt set up.

08-20-2009, 02:00 PM	#1
Primer70 Superbad Join Date: Mar 2007 Location: Pittsburg, CA Posts: 153	Exhaust Manifolds I have a 350 engine out of a 1991 K1500 pickup ( newer body style 4X4 truck ) that I'm gonna put this engine in my 2wd 73 Suburban. I'm wanting to know if anybody knows if the 1991 stock exhaust manifolds will fit between the 73 frame. I've measured & it looks close. Last edited by Primer70; 08-20-2009 at 02:08 PM.

08-20-2009, 02:06 PM	#2
Primer70 Superbad Join Date: Mar 2007 Location: Pittsburg, CA Posts: 153	Exhaust Manifolds I have a 350 engine out of a 1991 K1500 pickup ( newer body style 4X4 truck ) that I'm gonna put this engine in my 2wd 73 Suburban. I'm wanting to know if anybody knows if the 1991 stock exhaust manifolds will fit between the 73 frame. I've measured & it looks close.

08-20-2009, 10:54 PM	#3
Driveway Dreams I have car A.D.D. Join Date: Feb 2009 Location: Greeley, Northern Colorado Posts: 4,147	Re: Exhaust Manifolds I don't see why they wouldn't. Why are you using the manifolds from that motor? If they are too wide, you can probably find another set from a 350 that may be a little tighter. Or, if you have the money, a set of headers built to the rig would be awesome. __________________ -Gerald Building vehicles in memory of the first "car guy" I ever knew, my Grandpa. Bob Dunham 1935-2009. Rest in peace. 61 GMC Suburban SOLD The 86 build thread SOLD Are you a Colorado member?Click here.

08-20-2009, 11:03 PM	#4
Captainfab 60-66 Nut Join Date: Mar 2007 Location: Coeur d'Alene, Idaho Posts: 23,246	Re: Exhaust Manifolds I can't say for certain, but I don't think they'll work without cutting the frame. I've heard of a couple of guys having issues with the newer manifolds in the '63-'72 trucks, which have the same width frames. It may be easier to use the manifolds from the '73 and weld in the bung for the O2 in the exhaust pipe. That is if you're running the TBI. __________________ Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE

08-20-2009, 11:10 PM	#5
f.monroe Senior Member Join Date: May 2004 Location: Caldwell,Tx. Posts: 3,648	Re: Exhaust Manifolds I had a newer engine in a 74 I had around 92 or so . I used the later manifolds and the driver side is real close . I remember using a brass plug in the O2 sensor hole and there may have been 1/8 inch clearance . I clearanced the frame about an 1/8 inch and it was fine . I remember the passenger side being fine . Frank __________________ Born and proudly residing in a Red State !

08-21-2009, 12:31 AM	#6
Primer70 Superbad Join Date: Mar 2007 Location: Pittsburg, CA Posts: 153	Re: Exhaust Manifolds Driveway Dreams, I have headers on the truck now. The old headers are rusted though, leaking & hang down too low. I'm just tired of having to fix header leaks, and the engine is bone stock. Thanks f.monroe. That's what I wanted to know. Did you use the engine accessories from the newer engine? I'm also concerned that the newer power steering pump uses a metric threaded pressure hose that may not work with my older steering box. I know there was a change in the steering boxes, but I don't know exactly what the changes were.

08-22-2009, 02:47 AM	#7
Primer70 Superbad Join Date: Mar 2007 Location: Pittsburg, CA Posts: 153	Re: Exhaust Manifolds Decided to go with earlier style exhaust manifolds. A buddy of mine had a set laying around in his shed.

08-22-2009, 02:50 AM	#8
Primer70 Superbad Join Date: Mar 2007 Location: Pittsburg, CA Posts: 153	Re: Exhaust Manifolds Decided to go with earlier style exhaust manifolds. A buddy of mine had a set laying around in his shed. I'm not keeping the TPI, but I am keeping the serpentine belt set up.



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