They actually made several different versions of that motor...
no
The 5.7 liter 350 cu. in. Chevrolet V8 is a small block. There is no big block 350.
Everything
160 foot lbs
Not Enough
205
It has 255 H.P.
1,8,4,3,6,5,7,2 same as the firing order
305 Small Block Chevy engines typically were 8.6 compression ratio and would use 87 octane fuel.
140 Hp
Yes. Chris Alston, at Alston Chassis Works, makes a kit, with everything you need.
A supercharger would have a dramatic effect.