273 piston options

I’d like to say 7k but as high as the stock stuff that’s going in it will allow - for now.
If I buys pistons that fit the stock rods then that’s what’s going in it now.
I’ll be using the stock rockers and flat tappet lifters for now.
I’ve got a set of solid roller lifters but I’m thinking solid flat tappet for starters. I dount think that will be the limiting factor just yet.
I’ll be doing oiling mods and Adding a stiffer spring to the Melling 72HV pump I found in the engine when I took it apart.
This is going to be a fun project for me, not a race engine. If the parts I choose limit me to 6k then that’s what the limit will be. Until I decide to buy a better crank and rods. Or springs and rockers if that’s what’s limiting me.
Short version: I’m aiming for 7k.
I have a 1965 273 short block in the garage with the domed 10:1 Commando style pistons that are 0.030" over. I haven't had it apart so don't know the history of the motor other than the man I got it from had it as a backup block for this custom race car. The Silver Bullet Dragster Comes Full Circle
My plans have changed and I don't need a 273 anymore so if you are interested in the used pistons, I could see about pulling the motor apart to see how the pistons look. I am not sure yet if I'm going to let the rods and crank go, but I definitely won't be using the pistons.