you can do what you want but the the 5.7/6.1 will allow you to control all you need on an 11 sec car.if you really want to complicate things even more eric makes a speed density chip where you would have to tune everything.have at it,but understand 11s can be had with a simple chip which is the beauty of staying so mild,you can still play with it if you want to.i would suggest you look at the different options from eric/turbotweak.The one thing I am not flexible on is upgrading the ECM. I do industrial instrumentation for my job and data is everything. I need more inputs. I need to control the tune. I know not doing it works for many people but it's just not my game.
You can be worry free while using a flat tappet cam either hydraulic or mechanical lifters. Many people will tout higher viscosity oils and zddp. The only thing you need to be concerned about as it relates to oil is the film strength of the oil. The top most protective oils that I know of are relatively thin oils and don't have any zddp in them. Amsoil 0w 20 signature series oil is about as good as it gets. It's thin and it has no zddp in it but it's very expensive.Probably don't need a roller for performance but is good peace of mind.
My first question is how far in the hole are the pistons you are using? Zero deck is your friend.