Not possible on a tight budget.
Forget not running OPTI-SPARK..because camshaft, oil pump, AND water pump.
That FACT(s) established, the next major budget constraint involves securing a computer and wiring harness.
Outside of that, it's a plug and play swap lol...it'll BOLT IN.
HOWEVER , you cannot run an LT1 without a computer - for cheap , think up some different plan. Not even with a carburetor. NOT for cheap.
You will STILL require a harness.
$$$
And a computer.
$$$
A '93 or '94 LT1 would be super cool though -

.
An LT1 is a marvel of engineering, dude is right on about "de-engineering" an LT1. Lol. Don't do it, you will be sorry because it would SUCK. PLUS be expensive as f-.
In reality-land the fuel pressure requirement is not really that high for an LT1 and getting the correct volume + pressure out of a carbureated square will actually be quite reasonable, I would imagine.
I would be quick to hunting down a TBI truck's gas tank and you could simply swap out that pump for an upgraded vortex pump - the plug is the same.
The General makes it become simple.
Good luck!
Awesome cool truck BTW. I want to see an LT1 in it!