CID. BORE. STROKE
340 - 4.04 - 3.31
400 - 4.342 - 3.38 (also seen 3.375)
.007 stroke increase for the B engine.
.302 Piston diameter increase for the 400
Looks like it’s a BIG BORE small block.
Correct me if I’m wrong ...
Stock piston height is 1.812
The KB 240’s have a 1.908 height vs a stock 440 of (if I’m correct...) 2.061. = .153 taller for the 440 slug.
Now how far down the hole are the stock pistons?
