Hudson.The difference is the 140 springs have pigtails on both ends.The upper end bolts to the frame using a large rubber pad and steel washer.The 240 springs only have a pigtail on the bottom end.The top end is the same size around all the way to the top,(Aside from the bottom pigtail,follow me?) In the 240 there are bell shaped parts that bolt on using the same bolt that was bolting the spring to the frame.The bell shaped pieces go inside the spring.Another benefit is the top of the spring won't be bolted in so rear spring changes become 1 very accessable bolt.I will take pictures tommarrow.I should have a 140 (mine) and a 240 on a lift.