If it were me, I would look into getting some vortec heads, maybe a comp cam XE268 or so. Then an Edelbrock performer rpm intake, 600 holley. Then some block hugger headers. I don't think I would bother stroking a 305. Just save your money for a future engine build, i.e. 350, 383, 406, or maybe even a turbo. Once your Dad sees that you can be responsible with the 305, maybe he will go for it. Anyway, good luck on whatever you decide.