Crankshaft Grinding

I am trying to do this build on a budget. This all started with me just pulling the 383 out of the dart to check it out and my main goal was to buy a set of heads shortly but i want this thing to be faster than the 13 second passes it has been running. I figured it is apart, why not see what options i have. I am not trying to make 700 or 800 hp, if i was it would probably be the source kit and it wouldn't be much of a budget build. Any ideas on how to make this thing faster, stock stroke or not, i am open to options.