3500 miles in 52 weeks, points to 67 miles a week, or 9.6miles a day. That's like two spins around the block here where I live. Not sure that's even worth spending money on the 318 for.
My take is;
put a 4bbl on it, dual exhaust, a 2800 convertor, a 3.91/4.10posi in the back, and call it done. Yur gonna end up here or close to here, anyway, so you might as well start here. Who knows, maybe this will satisfy your craving.