Power loss to ignition no gauges radio nothing

[Shofoo]

This is the fourth time this is happened but today I replace fuel tank sending unit put a new carburetor 150 amp alternator Excelerator cable TV cable truck turned over after the fourth try to get gas up to the carburetor complete loss of power I have power going to the backside of the firewall in on one or two places on my fuse box I just replaced the ignition switch still no power it’s just one thing after another two years on this build.I have a slight build 350 with a 2800 Stall 6 inch lift on 20 inch federal 35 complete front end rebuild etc. and now after fighting my fuel  issue I decided to replace one tank because I have duel tanks.And now I can’t even find out if it runs LOL I am completely lost except for buying a whole new wire kit any suggestions thank you

[riverbanks]

Check the fusible links leaving the starter, running up pass side of bellhousing