you're going to have to get creative with the pulley spacing because the dampener is thicker. you'll also need to elongate one of the holes to make the crank pulley work.
the smarter/easier play is to find 360 pulleys that match what you're trying to do-- ie ac/no ac, ps, double belt on the fan/alt. and then just use the 273 cover and call it done.
The balancer is thicker, but I thought the face where the pulleys bolt on was in the same relative position? The pulley fit inside of the balance ring. I could be wrong, or just senile... but I know I've done this before, a time or two.