According to "Battle Honours of the British and Commonwealth Armies" (Baker, 1986), 4/6 Rajputana Rifles was awarded the following battle honours: Alem Hamza (1941), Ruweisat Ridge (1942), El Alamein (1942), Matmata Hills (1943), Akarit (1943), Djebel Garci (1943) and North Africa 1940-43. MG/6 Rajputana Rifles was awarded Akarit (1943) and North Africa 1940-43. 17/6 was awarded North Africa 1940-43. I couldn't find any Indian units among the 1st Army battle honours, so I assume that all the above mentioned battalions of the 6th Rajputana Rifles would be entitled to the 8th Army clasp.
/Jonas