This one was out of print for a while but it was re-released late last year:
Maximum Performance: Mopar Super Stock Drag Racing 1962 - 1969
www.amazon.co.uk/gp/product/0760355657/
Not strictly all super stock related but interesting none the less:
Match Race Mayhem: Drag Racing's Grudges, Rivalries and Big Money Showdown
www.amazon.co.uk/gp/product/1613253052/
adrian.