ball and cup pushrods size for a 360

whats the length of a standard LA small block ball and cup pushrod. yes its for a after market roller rockers. and is there any difference in the pushrod length if you have the 1.6 ratio over the 1.5 stock, planning on eddy's w/mopar performance 1.6 roller rockers. another question is the eddy's size of pushrod going to be the same size as say the j head.