My experience with my BMP aluminum block, B1 heads, and 1.7 rocker ratio is the same. (180 to 70 deg)

Details:
Taller head (deck to rocker shaft) will expand more than shorter head (Edelbrock RPM).
Rocker ratio changes it a little, est 1.5 ratio using 0.012" changing to 1.7 ratio (1.7/1.5)x0.012 = 0.0136"
Difference between Cold and Hot temps changes lash. I use 0.00013" per degree temperature change.
50 deg F, 0.006" lash
70 deg F, 0.008" lash. (70-50) x0.00013 = 0.0026 lash change
180 deg, 0.023" lash. (180-50)x0.00013 = 0.017 lash change
200 deg, 0.026" lash. (200-50)x0.00013 = 0.020 lash change