i made 338 @ the wheels justin with the black gmc made 340. all with 5.3 no heads

 

would those fit a 4.8?

 

sure will

 

Do 4.8 pistons have the same compression height as a 5.3 piston? Is the rod length the same from a 4.8 to a 5.3? Pistons from a L33 5.3 are another possible solution.

Unless you mill the LS6 heads, you'll lose compression on a 5.3.

 

4.8 pistons will not raise compression in a 5.3. They are the same motors, the only thing different is the stroke. The heads are the same too, just different numbers.

 

4.8 pistons are flat tops and 5.3 are dish.

 

The 4.8 uses a longer rod, not sure on the length, 6.285 I think

 

The 4.8 pistons will "bolt" in to the 5.3

 

So about the L/T headers, will Thorley work, or is that the wrong choice. Let me know.

 

So the compression height is the same? It must be the longer rod that makes up the difference in stroke then. Good to know.