You definitely need initial timing close 20or above but that will require recurving your distributor . You don’t want a total of 42+ after you change the initial. Research how to recurve a mopar distributor. It’s not that complicated .
And your compression must be pretty low if you can run 89. Like Rusty said the cam will work much better with 10:1 + compression.
Then you will most likely have to do some carb work .