OBS to LSx conversion

[s10mods]

I was just reading through this topic again. there is a lot of good info here. this should be a sticky

[Weird_guy]

<div class='quotetop'>QUOTE(s10mods &#064; Jan 6 2007, 04&#58;06 PM) [snapback]78539[/snapback]</div>

I was just reading through this topic again. there is a lot of good info here. this should be a sticky
[/b]

+1 on that.

[Germany]

Great info. Who sells the ac adaptor or relocation bracket to use the 95 compressor on a ls engine?

[Bobilly]

Agreed. THis is a very helpful thread. Shoudl be read by all before they try their first swap!

[jmpidgeo]

Just read the whole thread.

Lots of good info in here After reading this, the wiring is the only real thing that is puzzling.

I do have one specific question though, related to a LY2 swap into my '92 full size Blazer.

What do I have to do related to the stock trans in my '92? Its a 700R4 with the only electronic piece being the torque converter lock up. I have read that I can wire the trans so the torque converter locks up automatically, but that it only does so in OD, where mine locks up in 2nd, 3rd, and 4th (I think) and want to keep that functionality. Can this get wired to the factory engine computer? Does it need to be wired via a separate torque converter lockup control system?

[GM400Z]

Awesome thread! I plan on doing a 5.3 LS swap in the near future. Just put a good TBI in along with rebuilding my 4l60e :/ but I figure I can atleast go ahead and get my motor and EVERYTHING I need so when the time comes I'm ready to go and probly have them build the 4l60e up again.

I'll need
motor
cpu
wiring harness
fuel pump
motor mounts
headers/manifolds?
adapter to use my 95 4l60e

also was wondering will it will look cool but will it help the wiring process to buy a gauge cluster from a NBS 99-up?? Can't wait to find a good motor. Can't decide if I want to just find a low mileage 5.3 or re build it and build it up. Probably just go with a low mileage if I built it up I would never stop until it was insane, and that just cannot happen.

[droopyzda1]

I had a 2000 Silverado extended cab I sold a couple months back and loved the 5.3 I had in it. Had it for 4 years and no issues. Hence this swap I am now doing to my 1994 C1500 W/T. This is my engine first swap. I am mechanically inclined and I recently pulled out the broken 4.3 with 4L60e trans that was in. I was told the trans was rebuilt a couple years back so I would like to reuse it without spending any extra cash. I purchased a bare 2002 5.3 DBC with basically the block, heads, intake and wire harness that had been partially cut. The person selling it got it from LKQ for their truck but sold the truck before they can put 5.3 in. I got this and other parts off craigslist, so I call this my craigslist budget build. Throughout the pass few weeks, I have gotten a 5.3 flywheel with the concaved center (kind of curved in the center) where the bolts go, a 2002 PCM, 2004 full factory truck intake box and hoses, ls1 intake manifold (may hold off till later), just got a full engine harness and few other things from the internet like dirty dingo mounts and the rear lowering kit consisting of shackles and hangers. I swapped the frame mounts to V8 mounts already thru the lower control gap and it was not that hard as long as U have someone else assisting. I also pulled the bed off yesterday to change the fuel pump to a 1996 and later and since I am there, install the lowering kit. This is going to be a simple driver on the weekends, nothing to be raced. I have a few questions that I see different answers, so here they are:

Can I use my 1994 4L60e with this motor? Will a shift kit or a stall converter help with extra power of the 5.3? Which stall converter would be best?

I read up on some people saying to swap out the inside trans harness to that of one of 1996 and later. Or when I have the PCM reflashed, can I tell the one doing, it to disable the PWM for the older 4L60e trans.

I am looking for an inexpensive way to mount the old 4.3 a/c compressor. Is it possible to use the old 4.3 a/c bracket on the 5.3 with some modification?

Can the power steering pump off the 1994 4.3 bolt on the 5.3 alternator / p/s bracket?

I am thinking of deleting EGR and rear O2 sensors. I live in Miami which doesn't require emmisions testing, but I do not want to be killing myself with all those unfiltered exhaust fumes. Can I simply put on a couple aftermarket cats to filter that out? Will they last even thought the O2's will be deleted?

Can I used the 5.3 flywheel that is concaved ( kind of curved in the center) as is or will I need a spacer for the 5.3 to mate with the 4L60e? Or can I simply use the flywheel off the 1994 with a spacer and longer bolts?

Since I pulled the bed off yesterday I saw that the top of the sending unit has a bit of rust and corrosion. I was thinking of changing the complete sending unit. Can I change the complete unit to one off an '02 5.3 ?

I know I am forgetting something, thanks !! This forum is great and is helping me out with this swap, I just had these questions to verify

Here are some pics .......

ON THE WAY TO ITS NEW HOME:



PARKED AT HOME:





FUTURE WHEELS I HAVE SITTING IN THE GARAGE FOR IT:



PULLED THE MOTOR & TRANS:




THE NEW V8 MOUNTS:



THE NEW MOTOR:



THE BACK OF THE ENGINE:



THE WAY IT LOOKS AS OF 4/6/13:

[88blazerboy]

Very nice information RHB. Thanks! I think a lot of the procedures and parts will apply to my swap. Thank God I've got a little more room to work with in a full-size Blazer, and that I'm not stuffing a V8 under the hood of an S10

Do you happen to know much about the Gen IV motor swaps? That is what I'll be playing with. My research and talks with folks pretty much indicates Gen III and Gen IV's are about the same except for the following: Gen IV cruise control is difficult (um... more like expensive - about $300) to make work in older vehicles that use cruise control cables; then there is the AFM (automatic fuel management), but that isn't much of a problem I hear; lastly, some Gen IV motors have single fuel lines while others have double (I guess there is no rhyme or reason. You just need to know what you got).

[altereddezignz]

I have a question or 2. Are you using the stock frame engine mounts? and here is what i am looking at using for the egine mounts on the motor if i can link this? If not i do apologize.
http://www.lssimple.net/lssimple-eng...p52m6prp3q69ao
And what kit did you use to move the ac compressor. I don't think i ever saw if you said? I have found a kit from summit.
http://www.summitracing.com/parts/hly-20-131http://www.summitracing.com/parts/hly-20-131

Again i hope that it is ok that i posted these links with these questions.