You need to be more specific on your question, add a little detail to it.
that should have the HEI distributor so the plugs should be set at .045
Yes it will fit. This distributor will fit all small block and big block Chevrolet engines.
1,8,4,3,6,5,7,2 all small block and big block firing patterns are 1,8,4,3,6,5,7,2 for Chevy
The distributor can be turned both ways. The rotor however, which I suspect you are asking about, turns clockwise on a small block V8.
No the distributor gear that is on the end of the distributor is to small for the big block cam shaft.
no
Cranksaft turns twice for 1 distributor rotation.
Are you asking how many freeze plugs are in a small block 400? If you are it varys, could be, 8 could be 10 depending on which casting you have. I hope this answers youre question.
NO. Depends on the year. On the pre-fuel injected motors, all Chevy V-8 engines used the same distributor. Use some common sense, a 1968 distributor is not the same as a 1980, but you get the idea. Use one from the same era as your vehicle.
On a small block Chevy the distributor goes through a hole in the intake manifold. On a Pontiac the distributor goes behind the intake manifold.
Most SBC have a port next to the distributor.
It's usually on the rear rail under the distributor.