There is no sense in stroking a 305.They are ok for a street application,but make no horse power any where else.It is Chevy's pig of pigs.I and a friend of mine spent countless hours trying to get the 305 into racing form.Our dyno runs never had the results we were looking for.the 283,302,and 307 run circles around the 305.even with the extensive modifications we did,rod length,pistons,cranks,heads and such we could not get the needed foot pounds of torque that the even smaller motors can produce.We finally came to the conclusion that the 305 is good for getting the groceries and that's it.I am not knocking your motor,i am just telling you what i know after spending thousands of dollars trying to make the 305 into a all out race motor. I would say go ahead and dress it up but don't waste your money trying to make it bad!
