[Will I get bored of the 380 hp ford crate engine after a while?]
YES! I have currently 425hp (flywheel hp) and I want more. Sure I weigh more and I'm running a higher rear gear (3.25) and a .83 fifth tremec, but I want more power. (Don't forget the bigger brakes to go along with the power)
[How many stock cars are there out there that can beat a FF5 car with 380 hp under the hood?]
Depends on what your talking about. 0-60, 60-0, 1/4 mile, top speed.
0-60 - I would assume very few, unless it's another cobra
60-0 - Don't have a clue?
1/4 miles - I would assume very few, unless it's another cobra
top speed - alot more than a few. cobra do not necessarily have the best aerodynamics.
[Is there any stock car out there that can beat a 500 hp cobra?]
again it depends on what scale of performance you're trying to measure it on.
[What do you guys think the difference in 1/4 miles times will be with the two engines?]
Here's a calculator:
Prestage
500hp/2200lbs - 10.36sec/131.53mph
380hp/2200lbs - 11.36sec/120.04mph
I used 22% drivetrain loss for rear wheel hp! Assuming that the hp quoted is Standard Power/Torque.
[Can I add a turbo to the 351 if I get bored with it?]
I believe there are a few people who have already done that on this site. I'm not sure what engine modifications that will be necessary? lower compression? etc.
Samurai