SB 350 help

Hey Guys,
I got a new 350 engine in my pu. It was built in 1998 and I drove it about 500 miles and parked the truck.

I am not sure all the specs of the engine, but I am wanting to get started on the project again and what to start with a little engine boost. ( if ya know what I mean)

Edlebrock Intake
600 Holley
Stock heads (I guess) When the engine builder put it together for me he wanted to put some DART heads on it...for an extra $600.
I was broke and getting married so I had to pass.

Here is where I can not remember.....
It seems like he said flat Top pistons
and an "RV" cam? Does this sound correct?

I have no idea the specs of the cam and pistons other than what I listed above.

The exhaust = Stock.

I am thinking along the lines of a set of heads, headers + Exhaust, possibly a new intake and Carb, ( If needed )

The only thing is that I am sure that I would need to know the specs of the cam and pistons to understand the total package.

I really don't want to pull it all appart because it is brand new....

What type of performance could I expect?

Any suggestions?