First I really have to commend you for going through with a plan like this, it really takes some skill and know-how. I know you're probably dead set on building this motor, but the principles behind it don't really work that well. Your motor is going to have a long stroke so its not going to rap that well... maybe 6000 or so. Second its got the 305 bore which is small (3.5 if I'm not mistaken) so you lose the advantage of a big bore too. Take, for example, a 327. THey're great engines because they have strong cranks and a short stroke that allows them to rap really well. Same concept in a 340 too. With this setup I think you're defeating yourself for the extra cubes. Why don't u trade somebody for a 350 block and build a 383! Honestly you're talking the difference of 50 cubes here, it would be well worth the trade!
If you go through with the 305 stroker I hope it all goes to plan. I just had to give you the advice we all were thinking.
Good luck either way!