My 1999 OBS C1500 LQ9 6.0 LS Swap

[1GTEC]

Thanks for sharing! This is exactly what I want to do with my '96 when funds and time allows!

[ChevyMan90]

No problem! I enjoy seeing all the other builds on this forum so I figured I'd share mine. I made a radiator/E-fan mounting bracket a few weeks back and had it powder coated black.
I also did the exhaust a few weeks ago. It came out awesome, but was not easy doing it on the ground! A lift would've made it 10x easier but its done now and I'm very happy with the way it sounds! Its done with all mandrel bent tubing that I bought and fabbed up using 45's and 90's. Dual 3" with an H-Pipe into two 14x4x9 Magnaflow mufflers. Its got turndowns on it for now. Happy with the sound for sure! Only real thing left now is to clean up the wiring. On to the pics!

[ChevyMan90]

And here is the exhaust. This is coming off the headers:




All welded up:


And the rest of it. The H-Pipe, cutouts and Magnaflow mufflers.

[Chevydillan]

Looks good. That's almost a mirror image of the exhaust I built for mine. I did add tail pipes though. Mine is kinda raspy at times, have you noticed that at all?

[Big-Sexy907]

Fantastic work! I'm curious, do the Shoenfeld headers drop below the frame rails, engine crossmember, etc?

[ChevyMan90]

Thanks guys! I have turndowns on it as of now. The little bit that I have driven it so far I haven't had any rasp. I find that the Magnaflow mufflers get a lil louder over time so hopefully I won't have any rasp later on. My Schoenfelds do not hang below the frame or crossmembers at all. The only real concern I have ran into as far as clearance goes is that the LS truck oil pans hang a little lower than the pan did when the truck still had the Vortec 5.7.

[Skylark]

Thanks guys! I have turndowns on it as of now. The little bit that I have driven it so far I haven't had any rasp. I find that the Magnaflow mufflers get a lil louder over time so hopefully I won't have any rasp later on. My Schoenfelds do not hang below the frame or crossmembers at all. The only real concern I have ran into as far as clearance goes is that the LS truck oil pans hang a little lower than the pan did when the truck still had the Vortec 5.7.

Can you please take a picture and a measurement of how far below the frame it hangs down?

[gagliano7]

My Shoenfeld headers are about an inch above the bottom of the frame rails. My truck is lowered.

[choptop0130]

do you have plans to put the air conditioning unit back in and if so how much trouble will it be?