MOPAR/AMC motor question?

put a 360 in it its easier and there's more room for the small block engine and you can get as much horse power from it as you can a big block,the 383 will fit in that car though ,its been done a few times already,but you,ll have to do some modifying to get it in there,for what it was the 304 was a real good engine,they just aren't as much on horse power as the 383 or the 360 would be in that car,good luck.