Tips on how to replace flexplate and which one to order?

[SnS C10]

Hey guys on my 86 4x4 suburban with goodwrench crate 350 the flexplate is cracked. Looking at flexplates i see that there are internally and externally balanced ones. It would seem the 86 and new one piece rear main 350s require an externally balanced flexplate? I assume that is also why my current flexplate has a counterweight on it? I just want to confirm that when i order a flexplate that i get the correct style, can you guys help me out?

Now for replacement. I have read that I can get some 8" long bolt and put them in the bottom trans mounting holes, unbolt the trans from the cross member, unbolt the torque converter and slide the trans back a few inches....

Will i need to disconnect the 4x4 and column shift linkages?
Trans lines?
Drive shaft?
Starter?

Any advice on what all needs to be done exactly i would greatly appreciate

Heres a picture of my current flexplate also