Help with Valvesprings and valve float. Noob

Ok guys another noob question as I start digging deeper.
I wanted to double check my installed height and check out my geometry after reading B3s tech. My installed height on the number 1 exhaust valve is 1.8. Like I remembered but when I checked fully open height the measurement was 1.5. Does that seem normal? Or is that shallow as if a lobe has been wiped....now I double checked the lift of what the exhaust is when running 1.6 rockers and comes out to be .588.

Side note I'll be contacting B3 soon to go over my **** show.
Thanks guys