I cannot say with any certainty but I am sure there are a number of new 426 Hemi's with shakers on them in the world. Other than the motor mounts, I do not believe there any other significant difference between a newly made engine and the originals. I know the intakes are the same and the valve covers.
440's and 426 hemi blocks are entirely different concepts in mounting technique.
440's have webbed feet that come off the side of the block
426 Hemi's are bolt holes on each side and brackets mount on. It's a 6 part system to the K member.
Try using Schumacher mounts as shortcut to save money then cry afterwards for attempting it to work with a Shaker Bubble.
Newly made blocks are Siamese bore which are claimed to be stronger. OEM blocks will work just fine for street & Strip. Reproduction Valve covers are O.K. The oil filler cap is clocked wrong so the ears are 45 degrees instead of horizontal like OEM.
Many have said before that they had to have the whole block gone thru by their local machine shop because the tolerances weren't very good on crate Hemi's. Don't assume that these are a plug and play, drop in...get it checked first!
Intakes on Hemi's offer different carb bolt patterns.
Small early OEM Carter bore or the Marine open square bore for later Carter's.
It is without a doubt very easy to get into $30,000 for a well built stroked Shaker Hemi set up.