NO. Not even close.
small block and big block motor mounts are the same, so you should be able to take V8 motor mounts from most any Chevy engine bay.
no
Yes, a 283, 305, 307, 327 etc will fit. You should be able to use small block motor mounts from 1966
the big block will bolt right to the small block motor mounts but they do make big block motor mounts that you can buy and install on the 66, it lets the engine sit a little lower and further to the drivers side.
I recently built a engine test stand for a 402ci Chevy engine. The distance between the motor mounts is 16 1/2 inches center to center. This should be true for small block and big block engines.
The small plugs, on both sides of the engine block, at the rear edge of the motor mounts. A pita to drain. You have to remove the motor mounts.
Yes.
It sounds like you want to know how to change the engine in a 1970 Chevy truck from a small block to a big block. If that is the case; there is no difference in the mounting of the engine to the transmission or motor mounts. The exhaust system will need to be changed, and the small block radiator might not be big enough to handle the extra heat made by a big block when it's being worked. (such as on a hot day or pulling a heavy load)
Very easy. The four bolt holes on the front of the motor, are for the early motor mounts. You will either need to get a bellhousing with the early mounts on the side, or, if you are running an automatic, you wil have to make, or buy, a cross member.
change the motor mounts and get the computer and wiring harness out of the donor car that the small block came out of.
A small block. It is the first motor squared, by Chevy, meaning it has a 4 inch bore, and 4 inch stroke.
The 400 Chevy small block motor should have approximately 390 horse power. It should have 427 foot pounds of torque.