You are better off stroking it. The 400 has 4, and 1/8th inch bore. It also has siamese cylinders to accomodate the larger bore. And, the water does not use water to cool. It has steam holes, as the cylinders are too thin to run watrer, so, remember to have your cylinder heads drilled out for the block. To bore that motor, you would have to sleeve the cylinders, then bore them out. Very expensive.
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.
413
19'
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.
Yes.