suggestions for my 340?

I have a 73 duster 340. Not sure what my gears are... probably 3.73 or lower (3.9 etc), hard to say with the small tires on it. From what the previous owner told me, it has a MILD cam in it.. and a 600cfm edelbrock carb. otherwise its basically stock. not sure on mileage etc. etc. either.

I would like more hp out of the car. Its peppy, but not what I would like it to be. I'd like around 350 to 400hp. This is on a budget, so i want to keep it under about 2k$. :newb:

What all would I need to get there? CAN i get it there with 2k$? :blob:

not sure if its a numbers matching block or not, or even if its a 73 motor. I just know its a 340. :violent1:

Thanks