I have a 1970 240z, and for a very long time I have wanted triple weber carbs. The problem is that 1600 dollars is out of my budget range, so I tried to find them second hand. I already found a manifold with linkage, but here is the question; what type of webers do I need? I know I want DCOE 40's but there seem to be some different types of those. Are the different looking ones any different? and if yes what is the difference and which type do I need.