My 1999 OBS C1500 LQ9 6.0 LS Swap

[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?

[ChevyMan90]

I do plan on putting A/C back in the truck. I will have to buy a bracket to mount the compressor. The wiring harness I am using has an A/C signal wire that I will have to use in order for it to all work. Here is a picture of how the headers fit. I'll have to get another for the oil pan.

[mopower440]

is the 4l60e holding up to the 6.0?

[ChevyMan90]

Yep, so far so good. Only have maybe 100 miles on it though. Its a fresh rebuild with shift kit and all the bells and whistles. I'm running a Tru-Cool 40K so that is surely keeping the trans temp down. Heat is usually what kills them.

[Big-Sexy907]

I do plan on putting A/C back in the truck. I will have to buy a bracket to mount the compressor. The wiring harness I am using has an A/C signal wire that I will have to use in order for it to all work. Here is a picture of how the headers fit. I'll have to get another for the oil pan.

That looks like plenty of room... I plan on body dropping my truck after I finish another car I'm working on and long tubes that stay above the front frame rails are hard to find.

[ChevyMan90]

Well the wiring is finally cleaned up and loomed. I think it came out pretty good. The only gauge not working is my fuel gauge. I did a bunch of searching and repinned the LS PCM with the 2 necessary wires from the factory black box computer and it still isn't working. I had adjustments made in the tune and still have had no luck. If any of you have any tips for me let me know! Just wanted to share a few engine bay pics. Still have a few little things here and there I want to fix up but its 99% done. It sure is fun!

[Lextech]

There are no tips for the fuel gauge. It has to be corrected in the calibration.

Jeff

[gagliano7]

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