Weighing my options

The only thing i'm trying to say is that you start with what the factory gives you. The 360 got only like 245 hp and the 340 got like 275-300 depending on what carb. set up you have. But sure you can build anything to make one motor better than the other. I have just never really herd stories about had bad a 360 was, i have herd that 340 were mean. I'm just trying to all this on a budget and trying to plan ahead to make the best decision for myself. I just want a street car with a little muscle behind it. Which is why the tread started out "Weighing my options." To decide how hard it would be to put a 383 in my car.