Okay I have a few questions
1. Will a LSJ head bolt on to a l61 bottom end?
What modifications will I have todo and will it make more power with this head swap

2. What other swaps are out there for these l61 eco tecs to bolt on
3. Witch of the 2.4 intake manifolds swap onto the l61
What year make and model do I get this intake off of

4. Will aluminum spendable off of a colbolt or Malibu work on the stock lower control arms on a 2004 Chevy cavalier

Answers to all this are in the forum threads already. Do a forum search. The intake manifold was tricky to find, but you want the 2.4 manifold from the ecotecs not the quad 4. And I'm not sure about the spindle, but the suspension looks similar between the two, so "maybe?"