Budget 340 Upgrades

I have a 73 Dart Sport 340, auto, 3:55 gear. Car has 41k miles all stock and mostly original. I have some noise, worst when cold and have figured it is the cam and lifters causing it. When I first put the car on the road cylinder 1 compression was 125 and the rest were 145. My plan is to do a leak down test and see what the problem is. I suspect its is due to a worn cam. If the bottom end is good and passes the leak down my plan is to get the Mopar performance Aluminum heads p5153849 a new cam, roller rockers, and Peformer rpm intake. I don't want to change the converter and this is a street car only. Will these heads work well with the stock pistons? Is a roller cam worth the money. Has anybody used the performer rpm cam?