I did one not long ago. Hart's Parts makes a good conversion from AMT kits. My grill got damaged, but it still looks good. The decals I think were Phoenix, but I can't remember. Over all the car came out good, but the tail lights will always be off. The tail of a 71 is just too different from a 70 to do a good conversion.
SAM_0599 by Eric Lucas, on Flickr
SAM_0601 by Eric Lucas, on Flickr