I just bought a 6.0 from a 99 2500 hd

The queston is am i goin to have trouble with the flywheel and starter are the ..
Im putting all the Ls1 heads brackets intake everything im alreading ready to put oil pan oil pum and all my bottom end need help please...!!!

 

the starter and flywheel are the same and all the LS brakets will work but I believe one bolt hole or the alt will not be drilled on the 6.0

 

its just that i look at the crankshaft and at the end it looks like its farther back than ls1 crank... its a 99 where the rear main goes it looks like double the thickness

 

you will need a LS1 balancer they are internal balance so you can swap them out and yes the 99 to 02 6.0 has the longer crank snout so it will bolt to any older trans 700 th400/350 but will not work with a newer 4l60e but will work with a older t56

 

you need a block that is 02 up they used spacer to bolt to the 4l80es the 99 to 02 just bolted up

 

So there is no way i can get my 2000 4l60e to fit..?? And would a 4l80e thats 4x4 work..?? Thanks for the help...!!!

 

the 4l80e will work perfect but you will have to take it apart and replace the output shaft at the rear to a 2wd shaft and the 4l80e is a BA trans shift kit alone is good to 550 hp its a th400 with overdrive but parts are not cheap for the 80s I know I just built one

 

the 60 will not work the cheap alt would be to get a th400 for around 300 and bolt it up or get a crank from a 2002 up and swap it out

 

Yes. Use a non-LS 4L60 converter.

The other choice is to swap in an LS1 or later LQ4/9 crankshaft. Even a 5.3 crank will work (rebalance highly recommended).

 

You need to learn how to punctuate. Caps at the beginning of sentences also help make it easier to read.

 

Will work on it. No promises though

 

Okay.

Using my Super Secret Spy Decoder Ring (thank you, Cracker Jacks), I think when you say:

You mean:
"You need a block that is '02-up. They used a spacer to bolt to the 4L80E's. The '99 to '02 just bolted up to 4L80E's."

It is true about the '02-up and spacers. My 6.0/4L80E had just such a spacer (and longer bolts).

But, you don't need the '02-up "block". It's the crank that is different.

And, as I already stated, there is a way to use an LS1 4L60E with an early 6.0 crank.

 

So with all your information you all provided i think my best options is to get my ls 1 crank and shove It my 6.0...!!!

Thanks to lunati397 & five7kid for all your help...!!!!!

 

If you're pulling the 6.0 apart anyway, that's a good option.

 

Quick addition, but your years are off slightly

The longer crank was only used from 99-00 on iron head'ed 6.0's. If its got alum heads, its the short crank version

Iron blocks did not change enough to mention for all the GEN III years for each displacement. I.E. a 99 6.0 block is the same as an 05 6.0 block