I found a 99 6.0, and want to put it in my 05. The heads are iron, and I will be using my TSP 2.5 heads. I will more than likely end up with new pistons so that the compression lowers. Is there anything else I should know before I try to tackle this job? 6.0's are real hard to find around this area.

 

Those have longer cranks.
But since your running a 4L80E, that shouldnt matter, just wont need the spacer if i recall..

 

Ok thanks for the info. Does anyone else have any hints?

 

What CC are those heads?

 

Mine are about 60cc, I have been told that 317's are 71.06cc. That means I would have to run a gasket about .070 to make the comp ratio about 10:1. Or I will have to run pistons with bigger dishes.

 

6.0 head gaskets are different from 99-03 and 03.5 -up IIRC, as well as the head bolt length, SDPC helped me when i needed these pieces.

Good luck with the swap!

 

Head gaskets should be the same on the 6.0L and won't matter if he gets Cometic's in a custom thickness, the bolt length between the years is what changed.

 

I think I will get new pistons, and more than likely get LS9 gaskets. So the bolt difference differs from the block? I thought the heads were the determining factor for what heads to use.

 

Yes, the length of the bolts changed. In other words the depth of the threads in the block. It has nothing to do with the heads them self's or the pattern.

 

Whats your target compression ratio??? Thickest Cometic I see would be .140 in the 4.060 bore