Hello im new here and i'm looking to swap a k series motor into my 99 civic si. i heard of the k20a k24a and so on but i'm not sure how too tell which is which. i found a k20a for 1500 and a k24a for 1200 but they say the k20a is not the type r so what would it be? and is it worth it for me to buy the k24a? please help