452 heads on a 1965 Wedge ?

You might consider 906 Heads.
Two or three less CC as I recall would
get you near 9.5 Compression

The 906 head flow considerably more
than the 452 in stock form.

You do have to consider the seat issues.
I know 906 heads do not have harden seats.
I do not remember if 452 sometimes or always
have harden seats or not.