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a 400 small block Chevy has a 4.125" bore.
The 400 Chevy is a small block engine. The 400 BIG BLOCK Chevy does not exist! 402 big block Chevy does. it seems in the early 70s Chevy put 402s in their pick ups and they had 400 badges. this opened the can of worms known as the non-existant big block 400.
1981 was the last year the 400 small block was made.
Yes.
The 400 Chevy small block motor should have approximately 390 horse power. It should have 427 foot pounds of torque.
I believe 180 F for most of the older small block chevy. Make sure the head gasket has "steam holes" since only the 400 uses them. The steam holes are above and below adjacent cylinders. Dennis
19'
413
350 and under are small blocks. There is also a 400 small block but there is a 400 large block. 396 and up are big blocks.
Yes
Dextron.
Around 550.