So upon further digging I realized this is a 400 block not a 440. I know that they are similar in
hardware and such just the 400 is a bit narrower. So will most of this information based on the
440 swap be similar to a 400 swap.
A 400 has the same low-deck external dimensions as a 383 and is a way better deal. I'm building a
470 out of one with a 440 Source stroker kit but 512 cubes is also available for the same price.
This will look like the 383 Duster pictured above and is MUCH easier to fit exhaust headers on.