Body Fillers

I just put new rear quaters from AMD on my 70 swinger. Now it is time to decide what filler I should use to fill in the area from the quater fender to the roof. Some people say short strand kitty hair from evercoat is good or metal to matal from evercoat or USC. Any suggestions. Thanks Ken

Don't mean to hi-jack, but hopefully a good question to ask so every one can see for future reference. Just wondering if the quarters were pretty good quality and if they fit pretty good. Thanks, Keith.