Some more exhaust discussion

My plans are set for this endpoint, but when I upgrade to PS I'll have to change the left manifold like everyone else. I'm curious if anyone has tried installing a set of shorty headers for the 3.8L buick. Looks to me like it would work. These would be a much better choice over long tubes and still allow an in frame exhaust. If you're not exhausted about this topic, what's your thoughts? View attachment 16034

 

I don't think shorty headers are really going to give you a whole lot more. I tried headers on my first jeep, and after leaking and rust etc. I went with manifolds and am very happy with them, yes swiched my drivers side.

 

I was under the impression a switch to a left side manifold was necessary w/ the sag swap.:?

 

No, I think you switch out your left side to a right side, right? In my experience, the left on goes right through your steering shaft. The right side will exit toward the rear. I need to figure something out too because this is really holding up my m38a1. I think I might try to bring my left side manifold to a welder who has diddled with cast before.

 

The original left side manifold on a 225 V6 exits the front, so what would you gain by changing it w/ a right side rear exit? It would become front exit on the left.:?

 

I am running headers with saginaw steering. Used AA headers for a buick 231v6 converson for toyota. They dump inside the frame rails. Rear exitting exhasut is tricky, but doable.
Ty

 

Ooop's..I don't know where I got that idea. I havn't thought about it too much. I'm stuck between headers and fabbin.

 

Any pictures? Part numbers?:v6:

 

i picked up a driver's side exhaust mani from a mid 80's manza (or any 231 v6). its exits to the rear and is flatter than the traditional exhaust mani.

my intermediate steering shaft clears just fine. the pict is during the mockup so i used a scrap piece of pvc pipe to make sure of the intermediate shaft size and routing. see this link for images ...
http://www.earlycj5.com/forums/showthread.php?t=30671

 

Thanks, Zed. Really good pictures of exactly what I need, how the steering shaft runs and a good shot of the motor mounts too. Steve's point about the fact they are center dump gave me pause there too,but it looks like the mounts are far enough forward to miss them. I think I'll pursue this further, I would love to have a set of in-frame shorties.:v6:

 

Here's a few pics of my inboard exhaust - tight but doable...has not been "subscriber proven" yet
Ty

 

Just to clarify the photo of the driver's side muffler - yes those are fuel lines behind it YIKES. They were put on to moke jeep on and off trailer. Replacing with ss tubing this evening.
Ty

 

Nice set up Ty. Is it stainless? Any floor panel heating problems? That takes some really tight tucking to get 2 hushpowers in there and keep it all w/in the frame.:v6:

 

No, not ss.

The only area I am a little conscerned with, is over the rear axle. The guy who ran the tube, could've sucked it up higher in more of an upside down "u" right there. I'll see what happens when its fully compressed.
Ty

 

Hope these help.

 

I'm running two right-hand side 231 manifolds (look identical to stock 225 manifolds except the dump is a little shorter) with manual Saginaw steering. It's close, but it clears and I haven't have had any problems. I've had this setup for about 8 years now.

 

OK, that bites. I did NOT know my headers would interfere with the power steering. custom fabbing brakes for the dana uprade disks, custon fabbing steering for the saginaw upgrade, custom fabbing dana18 single arm mount in putting the 420 in, custom this/custom that...anyone want a jeep?
i guess i need to start looking for exhaust manifolds and loose the headers. maybe i will buy turbo pistons and put the turbo on my jeep and route the exhaust over the top of the engine instead..=\ wonder how an oddfire block with turbo 231 heads will actually handle a turbo? that means i will need to get rid of the offy manifold and holley 470....man. ARG!!!
anyone know where i can score a set of manifolds? lol.
will mounting the steering box outside the jeep on the front of the frame change anything about steering rod location or is that normal location of the steering box for the conversion? i am goin to mount mine right under the bumper area...is that bad? any forseeable problems beside knocking it around on rocks?

 

You should start a new thread asking your questions individually. You'll get a better response than in this old exhaust thread (an exhausted subject really). I'll answer some w/ my limited knowledge. If you run exhaust over top, you'll run into a whole new set of problems, namely you'll be cutting up your hood. Besides I had a T-Type w/ the 231 Turbo and I don't think you'll like the low end response. Unless you do mud or sand all the time, I don't think you'll find a turbo all that helpful.
As far as the steering conversion goes. There's basically two ways to do it, a Saginaw box forward of the tie rods or a Ford style reverse rotation box behind the tie rods. I'll probably do the second bc it lessens frame flex due to steering and it's hidden in the engine compartment (cosmetic for me but it also gets it out of the way of rocks).:v6: