if your on a short and I mean REALLY short budget get a 305 because you can find a good running 305 for about $75 hell I gave my 305 away https://www.tamparacing.com/forums/s...hreadid=151592
there almost not worth having as a paper weight.
my 305 put out 175 hp and 255 lbs or torq in a 3500 lb camaro. it was a turd to say the least. civics were spanking me left and right. THEN I built a 355 (350 bored .30 over) and im having a HARD time finding one to beat me. go with a 305 for economy v8 power go 350 for substantial power.