OK here is a link fer upping the horse on yer 305. I also have a 305 i am putting in the nova wagon i'm buildin fer the lady. If I had the money to do these options then I would buy a 350. but if the 305 is what yer workin with and ya wanna slowly attain horse these parts can be added one or two at a time. Anyway take a look at the link.

http://www.goingfaster.com/spo/carcraft325hp305.html