I got the big bore kit from BelaCorse when he had them on the cheap ($350 I believe, now they're over $500 again). I figured I would do it someday anyway so I bought it on sale. I will be tossing it in next month sometime, stop in and give a hand if you want to.
I'll post dyno results later in the spring and compare them to my current setup. I got about 65 last time, hoping for close to 80 with the BB.