Also I was watching a uncle tony garage video on engine break in, he stated if your heads have heavy springs ,they should be replaced with stock ones during break in, do you think that is necessary with my head choices?
Your springs aren't what I'd consider heavy, but it might not be a bad idea to break it in using the stock rocker arms. I've used the stock rocker arms for cams with lifts as high as 0.470" without issue. Yours would be .477" lift with the stock rockers, so you would need to make sure the slot wasn't contacting the stud at full lift.
Below shows the additional clearance that the aftermarket long slot rockers (like the 1.6s you bought) will typically have over a stock rocker arm. I think the picture and measurements are for a big block, but it gives you an idea of the area you need to double check with the stock rockers.
If this was 1990, I'd say just install the 1.6 rockers and let her rip. Now, I might tend to break it in on the stock rockers. Brent posted a video on what to check on the lifters and cam before you install them. That is VERY important to check.