la vs magnum

so i have scrapped my original plan on using a 6.1 hemi engine due to size and crazy cost vs a small block build. i have access to the la 360 but am wondering which one is a better platform to build a 7000 rpm turbo engine with. the la engine is next to free which is a great thing but if the magnum engine handles rpm and power better i would much rather spend a little on purchasing a 5.9... opinions please thanks.

The LA should sonic check better in the bores...but I would check them! You want the thickest bores you can get...and the early blocks have thicker main saddles which help keep things where they need to be.
If you'll exceed 650HP, I would recommend an R3 if Indy has any left.
Brian