Help with choosing /6 build type for newbie

Thanks I have thought about making one mild and one wild. On the other side of performance what upgrades to stock transmissions to I just read article of transgo kit to 904 i am looking at the build sheet for the 72. I dont have it here but i believe the 69 100 has the 727. Or change them out. Any ideas and rearend setup especially if i put the supercharger in the 69. Some of the websites for these superchargers and turbos seem vague. Iam joining slant six org. Mechanics are not my strong point to say the least. I was at the Chrysler show in indy and the indy cylinder looked tempting but i want the more rare build and go supercharger possibly and learn alot more of course except advanced machine work.