That cam will work very well for your purpose. It will make more power than stock , expecially with headers and improved exhaust.
re 1.6 ratio rockers on a SBC.
The 1.6 rockers go on the intake side if you want a bit more power from high ratio rockers. ( you gain a small amount of top end power with the increased intake lift, especially if the cam is mild, especially if the heads have been ported. The exhaust side on a SBC head responds more to a duration change.
Often adding extra exhaust valve lift w a rocker ratio swap , shows no gain or reduces power.
keep the 1.5s on the ex side