Suitable Engine Supplier for a Superformance MkIII Cobra build

[CobraAddict]

G'Day All

I'm looking for advise on a suitable supplier of a 427 big block, preferably side oiler FE with aluminium medium riser Edelbrock heads and 8 stack FI to be fitted in my upcoming Superformance MkIII Cobra.

I'm based in Melbourne, Oz and looking to this forum for some learned advise on who might be a good, reputable, supplier. So far in my search I have shortlisted the following.

Prestige Motorsports
FE Specialties
Lykins Motorsports

I'm also interested in the Shelby Engines Co. 'all alloy' 427 FE they can supply which I believe is the engine of choice for their CSX continuation cars.

Any thoughts, advise, recommendations would be greatly appreciated.

Best Regs from Oz