rear spring Isolators

have a quick question regarding rear springs for a 1965 442 holiday coupe...do the rear springs not have an Isolator that goes between the top of the rear spring and the frame? reason I ask is that I recently ordered new front and rear springs for the car and where as I received insulators for the top of the front springs the rear springs came with spring pads for the bottom of the rear springs to go between the axle spring perch and the spring...are there no Isolators for the top of the rear springs? seems like this would lead to a lot of noise...

thx