The 305 was what old timers call a smogger. The Chevy 305 was never a performance engine. It was first built during a period when most of the auto manufacturers were struggling to engineer engines to overcome recently imposed emissions standards. Even an SS in the early 80's was no match for a basic V8 from the 60' or 70's. SS was nothing more than a label in the early 80's. You should look for a real performance engine if you are looking for power.
A 1974 Chevy Impala frame would work
Yes
yes, 82-93 are the same besides grill design
the 1996 and 1997 are the same and would not work in your 2000 straight from GM
Check with your local Chevy dealer on that.
That would be the 4L60E
no
A quick test without an ohm meter would be to pull on the suspected fuseable link wire. If it is blown it will stretch line a rubber band.
A Chevy K5 Blazer can be purchased at many different locations including Chevy dealerships. Another option would be in sites such as eBay and Craigslist where one can find listings from individuals.
Yah it will
Electrical, they're notorious for it.
I would guess about six quarts...