The edelbrock performer 350 crate engine has 310hp/375ft-lbs. So if you have the same cam, compression, etc., it should produce close to that.
There are too many variables. Take the stock HP for that engine and add 25-35 HP, that's my guess.
edelbrock has a square flange gasket fo it
The torker 2 is a single-plane design, so it won't work as well as a 2-plane such as a Performer or Performer RPM.
The Edelbrock carbs work very well right out of the box, so if you have the correct intake manifold it should bolt right on with no problems. The Edelbrock website has all the info you need for tuning and connectivity.
Chevy 265, 1955 -56. Want to sell it?
Hard to say, they have several intakes and carburetors for that application.
I've had good luck with the Edelbrock 1406 right out of the box.
The Edelbrock Performer and Performer RPM would be good choices. Also there are a couple Weiand dual plane intakes that would work well.
If it is a stock motor then yes it is. 600 CFM carburetor will be just fine on a stock engine.
Chevy didn't make an intake manifold for that 94 that you can mount a carburetor to. You will need to purchase one from an aftermarket company.