On the sides of the block, about center, just above the pan rail, there are plugs. One per side. 9/16ths size head. Pull these out, and the block will drain.
three
180.
Yes.
A small block. It is the first motor squared, by Chevy, meaning it has a 4 inch bore, and 4 inch stroke.
NO. Not even close.
The 400 Chevy small block motor should have approximately 390 horse power. It should have 427 foot pounds of torque.
no
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.
It goes in through the lower radiator hose, and out through the upper.
Everything is different in that motor.
When the center exhaust valves are side by side (siamese), it's a small block (EIIEEIIE). Big blocks are symmetrical (EIEIEIEI).
LT 1.Rated at 275HP."Second generation" of the Chevy small block.