I would recommend that you discuss the issue with L&M Engines in Malvern PA. They have extensive experience building high horsepower Mustangs and you can see their more or less standard offerings on their web site. This won't come cheap, however!Looking for opinion on the best place to buy a shortblock capable of holding Around 1200hp!
The Ford Racing Aluminator is as "Ford" as it gets and comes with warranty. May be pushing it with 1200hp though on the stock sleeves.Are you sticking with coyote? Your best choice may be to buy the internals and have a good local machine shop put it together. As far as I can find, there is no Ford built coyote crate motor with forged internals right now.
Edit: For off the shelf purposes, AMS offers a built shortblock
No doubt but they're not being made anymore from what I can tell.The Ford Racing Aluminator is as "Ford" as it gets and comes with warranty. May be pushing it with 1200hp though on the stock sleeves.
MPR, JPC both I have heard of good reviews.