My 94 has the same thing, two different sizes of tubing. That is the way I've seen it on other 2.3 engines. You can take the plastic elbow off of the top of the valve, and what the elbow is connected to will fit in the smaller tubing. The valve you get at the parts store is usually metal, from a dealer is usually plastic. That elbow had me dumbfounded for quite some time until I stumbled on it while taking some parts off a 2.3 at my local pull-n-pay.