That cam is the old Mopar Perf 296 cam. Lash is 0.028" in, 032" ex hot. With iron heads, you can set the lash cold & it will very close to specs. Vacuum will THEN increase.
Note that the cam has a lot of duration; it will need at least 30* for best idle quality & may require more.
Set lash properly & THEN check exh temps.
