1.5 Or 1.6 On J-heads??

well, im NOT choosing 1.6 to increase my cam but i THOUGHT someone told me to use 1.6 because of the SB valvetrain geometry and how bad it is.

i have a set of H/S 1.5's and CRANE GOLD's 1.6 which one to use?? i need to let the cam guy know which one im useing when i order my new cam.

my new cam WILL be right with the flow numbers of the heads.