Umm, well you will need a 3 inch stroke crank, the 283 stroke is 3 inch, but it is small journal and will not fit a 69 and up 350 block. The genuine 302 crank is large journal, forged steel and if you find one that is allright, they are expensive, you will need the 302 pistons, they have the correct pin height. All your late model rods will bolt right in, but some are better than others.

What are you using this motor for ? They create power up in the top end of the rev range but low rev range they are a chore to drive. So grea for racing but hard to live with on the street unless you keep the revs high. I asume you are using a manual gearbox. And at least a 3.73 gear ratio.