I got my 67 back on the road recently after way too many years apart and am getting ready to have new upholstery installed. Over the past few years I bought new seat foam and seat covers when funds allowed. After driving it again, I am considering changing out my non-headrest seats for ones with headrests. I have a chance to pick up seats from a 69 Camaro for relatively cheap money. Can I use my seat foam and covers from the 67 on the 69 seats and just buy headrest covers or do I need to pop for new foam and covers specifically for a 69? Thanks