another total timing question

I replaced the cam in my mild 360 for better vacuum for my dash controls inmy 65 cuda. I am using a vac advance dist. with a 11L arm in it. My carb is a 600 edelbrock and I am using the left timing port for my vac hose. If I use the full vac fort on the right it pulls to 45 degrees. I turned the set screw in the vac diafram CC wise 2 full turns and no change. I set the initial timing at 14 degrees with a advance dial timing light and it conferms the total timing at 45 degrees at 2800 rpm. Without tearing dist apart is there another hole in dist plate for vac arm to connect to to change timing advance or do i need to change spring tension or is the total ok as is, it seems to run ok. I know 34 is the normal . Without pulling dist out again I am not sure of its type, it was in car when i got it. Thanks