73-87 LS Swappers

[softballnrd27]

What headers are you using?
How much has the "extra" stuff cost you to do the swap?
What all do I need?
Motor, trans, ecu tune, exhaust, fuel system upgrade, mounts, and ????
I have been planning a 383 build, but for the price of the 383 build I think I can do the 6.0l swap depending on the $$ of the motor. Advise me please.

[MONTEZ]

Originally Posted by softballnrd27

What headers are you using?
How much has the "extra" stuff cost you to do the swap?
What all do I need?
Motor, trans, ecu tune, exhaust, fuel system upgrade, mounts, and ????
I have been planning a 383 build, but for the price of the 383 build I think I can do the 6.0l swap depending on the $$ of the motor. Advise me please.

There are too many varibales to say.... Depends on how stock you leave it and what quality of parts you want to use for the build. Not counting engine and trans price, I've seen them done for under $1k. This also depends on how much of the work you can do yourself. I haven't even got everything I want yet and I'm getting close to $7k.

[softballnrd27]

I plan to keep it pretty stock for the time being and then adding bolt-ons as time and $$ allows. I just want to get it in the truck and running for the lowest price possible. No ac for now until I get all the other ac pieces together. My budget is between $1500-$2500.

[MONTEZ]

Originally Posted by softballnrd27

I plan to keep it pretty stock for the time being and then adding bolt-ons as time and $$ allows. I just want to get it in the truck and running for the lowest price possible. No ac for now until I get all the other ac pieces together. My budget is between $1500-$2500.

Expect to spend $1k on an engine and harness with ecm. If you get it cheaper, even better. You'll have to modify the harness or get it done for around $500. You can get motor mount adapters under $100. Use the stock manifolds on the engine for the time being. Try finding an engine with the accesories on it, that can save a good bit.

[softballnrd27]

Should I run a 4L60 or 80 behind it? What came from the factory behind the 6.0l in the HD trucks?

[Clyde65]

4l80e mostly came with the 6.0 until you get into the newer truck 2007 I think. You could do a nice build with a 700r4 as long as your not pumping 600HP.

[softballnrd27]

I am trying to find a "complete" package and I would like to have a trans that can stand up to some abuse.

[68GMCCustom]

then get a iron 6.0 with a 4L80e or 6L80e behind it

[softballnrd27]

That's what I am looking for I was just curious as to what came behind most 6.0l is all. Just a curious question, what does it take to adapt a th350 to a 6.0l?

[softballnrd27]

Anybody use the Schoenfield headers? If so what is your opinion?

[68GMCCustom]

Originally Posted by softballnrd27

That's what I am looking for I was just curious as to what came behind most 6.0l is all. Just a curious question, what does it take to adapt a th350 to a 6.0l?

an adapter. it compensates for the shorter crank end.

[softballnrd27]

The adapter goes between the flexplate and the T/C or the flexplate and the crank?

[raycow]

Originally Posted by softballnrd27

Just a curious question, what does it take to adapt a th350 to a 6.0l?

A special "deep dish" flexplate is available to make up for the reduced crank stickout. You can also use a spacer with the stock flexplate, but then you need a special starter.

Ray

[68GMCCustom]

Originally Posted by raycow

A special "deep dish" flexplate is available to make up for the reduced crank stickout. You can also use a spacer with the stock flexplate, but then you need a special starter.

Ray

since the ring is on the outer edge...how would a deep dish not move the ring gear out past the stock position...causing the same starter issue?

[raycow]

Originally Posted by 68GMCCustom

since the ring is on the outer edge...how would a deep dish not move the ring gear out past the stock position...causing the same starter issue?

Sorry, I worded that badly. The flexplate is used with a spacer and the ring gear is offset so it stays in the stock location relative to the starter.

Ray

[85burb]

Advaced adapters sells kit with flywheel and bolts and converter snout hub for like 170 or so. That is where i got mine. I am using the built 700R4 i have but going carbed route.

[softballnrd27]

What do I use to get a VSS signal to the pcm if I use my current th350?

[68GMCCustom]

you have to disable it I think?

[softballnrd27]

Don't you need that for the ecm in order to drive? I thought I read about it on another forum. It really just depends on what the cost of the 6.0l/4l80e combe ends up costing. If the 4l80e jacks the price up too much then I will use my th350 for now.

[bark]

subscribed!!!! I am starting to collect parts for a swap in my 77 stepper and have all the same questions,

I just picked up an 04 2500 sierra with a LQ4 and a 4L80E, but its a 4x, so now need to find an output shaft and a tail housing. but while I'm in there maybe I could mod it some????

There sure is a ton of info on here, its actually overwhelming, all the different routes you can take.

[68GMCCustom]

I think I was thinking of the VATS. Got this off LT1 site.

VSS - If using a non electronic trans, You should KEEP a vehicle speed sensor regardless of what transmission type you use. The PCM needs to know if vehicle is moving. Without the speed sensor, you can suffer from reduced fuel economy, reduced power, and idle problems. There are a few options for speed sensors on the transmissions with cable drive output. View this link at Dakota Digital website. I have used Dakota Digital SEN-4160 with good success. This is a 8000 pulse per mile sensor, that will allow cable speedometer hookup. I can program any PCM to accept any # of speed pulses. (1996, 1997 Black Box Vortec PCM will not accept 8000 pulse input)

not sure of a VSS work around or if its possible...might check ls1tech.com

[kSStamp0182]

i am converting a 4x4 to 2wd too. i found the reluctor ring and speed sensor on this site (after HOURS of searching the web). http://www.transmissionpartsusa.com/

Originally Posted by bark

subscribed!!!! I am starting to collect parts for a swap in my 77 stepper and have all the same questions,

I just picked up an 04 2500 sierra with a LQ4 and a 4L80E, but its a 4x, so now need to find an output shaft and a tail housing. but while I'm in there maybe I could mod it some????

There sure is a ton of info on here, its actually overwhelming, all the different routes you can take.

[Juiced06GTO]

Easiest way to get a vss signal is with the dakota digital spedometer cable vss generator. I need to dig up the part number, but that is what I just did with mine. It outputs an 8000 pulses per mile signal that you wil need to update in the PCM once you get it running.

[love my 72]

does any one know of a motor mount adapter that will allow you to retain the A/C compressor in the stock location? is that even possible?

[Puglia10]

^x2!