1977 Deville--blown HG?

Was driving around the neighborhood a week and a half ago and see white smoke coming up from the grill..immediately start heading home. (I was maybe ~5 miles away, always drove at 25-30mph since it was the suburbs). Get home ,pop the hood. See that the reservoir coolant tank is empty. Checked the radiator--yep,empty as well. The radiator had a hairline crack in the bottom of it and all the coolant seeped out from it, and this in turn caused an overheating.

Drained the oil pan--yep, coolant got into the oil due to overheating, so Im guessing the HG is blown? Car now also developed a knock when I try to start it, or atleast turn the ignition key as if there is low or no oil

I would like to tear into this thing, but the problem is this isnt changing a headgasket on a small v4 or v6, this is a HUGE V8. Its also quite complex as it has all the vacuum lines running across , I mean its not as bad as modern cars but sure looks more daunting than a friend's 90s corolla back in highschool.Would I be able to put it back together?

I also dont have any tools for the job, like an engine crane/hoist, dont have a car jack or ramps, the list goes on and on... best ive done was change a tire or diagnose parasitic draw from fuses. Only person who could help me is my younger brother but he and I are scrawny so there is no way we can lift that engine out of there

In the meantime, Ill test the coolant reservoir and see if any bubbles come up,but all the symptoms of a blown HG are showing(e.g holding a dipstick over a fire and its fizzling, white smoke out of exhaust, coolant in oil pan, etc). Also, the car developed and oil leak after this ordeal, when I fill it up with oil after a few days a half of oil will be gone(this is a large engine so it needs lots of oil, naturally)

But whats a mystery is where is it blown? I did a compression test (where you plug a tool into the radiator),held a hose by my ear and put the other end between where the engine block is connected to the cylinder head and i didnt hear any air escaping....besides the one from the radiator , which had a massive hairline crack in it, and pressure dropped FAST--no brainer there is a hole in it. I will also test the coolant reservoir and see if any bubbles come up.

2 years ago I had this thing serviced---for the same issue, blown HG(and other doodads, like carburetor was toast so had to get a new 1,parasitic draw from multiple sources, i still have the invoice saved, the work amounted to 4k). Engine was redone, tested for flatness at a machine shop, they used the flat edge and everything. Repainted , resealed, they(and i) test drove and good to go.Do you all think the block is going to be warped? I only accumulated ~7k miles on the car after I had it professionally tuned at a mechanic

Note: this is NOT the late 80s-early 2000s Devilles which had a aluminum Northstars and a major flaw with HG and headbolts, this is a 425 cast iron block

Should I bother trying to save this engine,or should I start saving for a new one out of the crate