If anyone can help. Made a purchase of two cars and the one with a bad engine is a 06 impala lt with a 3.9. Bought another car and I thought it was a 3.9 but turns out it’s a 3.6. The other car is damaged but Ran fine just pulled the whole k frame out. Any help on what I would need to put the 3.6 Into the car that had the 3.9?