Going from carboration to fuel injection... got some random questions for the bubble body wagon guys

ok so first off,,, a long time ago in a place not far away....... all joking aside I have an 84 chevy estate. about a year ago i took out the tired old 275,000 mile 305, and replaced it with a beautiful sbc 406... so i have been running an out dated holley 4011 carb. ( really horrible fuel mileage from this carb) i have tuned and tweaked, -10f fires right up.. great performance, awesome throttle response, worst mileage ever....(like 3.5mpg) going to fuel injection.. fitech go 4 efi, they require 60 psi. and 200lph... so going with a factory 94-96 lt1 fuel pump in tank. now my question is will the 91-96 caprice estate fuel tank fit in a 80-90 estate, the reason for the question is to use a 91-96 sending unit. trying to stay with all factory parts. even if someone just has a pic of their tank out on the ground that would be great...

 

This fuel pump replacement deal shows the tank .

http://www.autoblog.com/2006/08/03/autoblog-maintenance-101-in-tank-fuel-pump-randr/

 

Here's a shot of mine, a '96 Caprice: