Well, it will work but they are going to have to cut a lot of meat out of the counterweights on the crank in order to get it all to balance because of the 305's tiny pistons. This means when you do put bigger pistons on there, you're going to have to have to use mallory in the crank to bring back the weight. Good luck finding pistons with the correct compression height for that crank. You may be able to do something with 400 rods and 305 pistons. Finally, you're compression ratio is going to be mighty high. You may want to use 350 heads on the 305 to bring it down some.