BBC build ideas?

[70rs]

Maybe some of you have ideas on how I should build my engine.
This is my first big block and any help in selecting parts would be appreciated.

The engine is a '77 454 out of a 3/4 ton truck. It is all stock and has never been opened up, it has 100k on it and runs good but I want to go through it and get more power.
It will be going in a 1970 Camaro with a 5 speed behind it. The car will be mostly street driven and may never see the track. But I do tend to have a heavy foot so it needs to be durable. ( I may do a couple open track days on our local road course just for fun)
I'd like to see 450+ hp and 450+ tq. And if possible I want to re use the stock crank and rods unless there is a cost efficient way to stroke it.

Can I reach these levels with the stock heads?
Any thoughts on which cam? Heads? Intake?

Thanks for any help,
Eric