stock LA heads stall around .485 lift. Your cam will need to be bigger for a gain in power with your new aluminum heads
Aluminum heads shed heat better than iron and need more compression to make the same power as their iron counterparts. On a stockish small block going to aluminum may gain nothing.
Adding a bigger cam moves you from street to quarter mile territory and now you need more gear and converter because of poor lo rpm street performance.
For the guys that just added aluminum heads and got more power i'd want to see the dyno sheets, unless their original heads had poor flow.
Most every body i talked to that added an H pipe could feel the power increase, but a 6 inch piece of pipe can't make any power.... that's another topic!
