If you are planning on running a 2004R, then I would re-emphasize the need for a 327. A 302 will be a dog. A 302 performs best when you can rev it to 7000 rpm. You need low rpm torque which a 327 would give you. A 350 would be even better, but since your choice is 302 or 327, then I can guarantee you would be much happier with the performance of a 327. Now if you were going to be running a manual transmission, a 302 could be a lot of fun.