Hp guessing

[Unit 5302]

375hp N/A from a 5.0 EFI engine? That's about 310-315rwhp, and a tall call for a streetable 5.0.

You'll need some more aggressive heads like AFR 165's or the TFS Twisted Wedges or your Roush heads. You may need to fly cut the pistons for the cam, and run an aggressive camshaft in the mid-upper 220s for duration and the .540-.560 lift area along with a Holley, TFS-R or Edelbrock Performer RPM type intake manifold.

Make sure you're geared with 3.73s or 4.10s to get a good hole shot as your engine will be lethargic under 3500rpm and won't make peak power until probably around 5800rpm.

375hp is enough to run mid-high 11s at around 115mph in the quarter.

The Roush 327AL crate engine with a very high performance carb setup, 2.05" ported and prepped Roush aluminum heads, a custom grind cam, along with a 10:1CR is only rated at 410hp.