new 72 c10 swb build

[jst4fun]

I am currently tearing down my 72 c10 and removing the small block. Going to be putting a twin turbo 540. What I am trying to build is ultimately a daily driver that can go to drag week, power tour, and some auto cross events. I know some people on here have probably built something similar to this but I need some help on deciding a d few things. So figured I would post up here and get some ideas and bounce some of my ideas off of some of you. With that being said I think I am either going to do a 4 link rear end set up or keep factory rear end setup and upgrade with coilovers and such. I am going to be putting in a moser fab 9" with 40 spline axles and such. I was wondering what you guys thought about either an 4l80e or a 6 speed manual. Also wondering should i be putting in a cage since I am pretty sure I should be able to get down into the 7's or even high 6's. So any advice would be greatly appreciated.