the dizzy from the B18 fits, no problem. But the vacumm on your present dizzy is a retard vacumm, that uses the lack of vacumm to advance the timing when you are idling (anti pollution) or put the other way, retards the timing when vacumm is present. Generally I don't hook it up to the engine, that way the timming is just mechanical and has about the same curve as the b18. The manuals all say to set the timing with the vacumm disconnected. I suggest you open up the dizzy, make sure all the linkages are free moving and then if you want you can even keep the vacumm retard providing it's not jamming. Keep it simple. Congrats on the wagon, they are the toughest of the bunch.