what would a good starting point be this combo ran 4.70s in a fairly lite hardtail shifting at 6800 rpms now going in a softail alittle heavyer same gear tire shifting on time suggestions

We shift about 7500 going 4.70's and 4.80's at 2.20...

Just for reference I go 4.50's 4.60's and am at 1.95 7400 rpm little bubs and 4.30 gear