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I was talking with a very nice guy at BBK on this exact topic.  I'll post an excerpt from his email here.  Just one guys opinion, but he's seen way more small and big blocks than I ever will.  After all of this, I've decided to go with a 331 or 347 normally aspirated with AFR heads.  330-350 RWHP range. RWTQ will be about 380.  After this, if I still want more, I'll add a supercharger, but I'm not expecting to.  

start quote:

A friend of mine built a FFR spec racer and bought a Keith Craft 427 aluminum Genesis block, then had that stroked to 472. He went all out on the car. The total price on the build was nearly $80,000 including paint and suspension tuning.

The car puts down 550 RWHP and the torque is equally insane.

Sounds awesome right?

Well the truth is that he can only use the engine to a small portion of it's potential because it makes too much power (yes there is such a thing). We have to pussyfoot around in the car.

After having the same conversation that I'm having with you, he decided that having that much motor in the car isn't nearly as much fun as having something more like a 331 that he can use to it's fullest capabilities.

He's had the car for 5 years and has never (not even on a race track) been able to open the throttle fully and hold it down to the floor until it was time to shift. The front end gets too light (handling suffers), and the tires spin too much (robs you of the raw acceleration that you want). Even with the IRS and race tires. Just too much.

Driving that car is like handling a gun, you have to make sure that it's pointed exactly where you want it to go before you pull the trigger.

Bryan Rogers
R&D Department
BBK Performance

let me start by saying i'm a technology fiend.  I have a 55 chev with lt-1, a 95 bronco with a built 351W, and just got rid of my z06 powered cadillac.  I love fuel injection.  Goal of this next project is a street legal driver but road race setup, good weight/HP ratio, big brakes, and low maintenance.

taking that into consideration, I'm working on building up a cobra on paper to do the real thing later on this year.  I'm relatively certain I want the following
351W block (stroked or standard) with fuel injection-any better weight to power?
automatic transmission (not mandatory, but strongly prefer) possibly with overdrive
No clue on standard limited slip rear or IRS.  Gear ratio somewhere between 3.02 and 3.73

Really what I want to see is the setup that will do a relatively good job of keeping traction during acceleration.  I could build a 900/900 big block, but i'm thinking it would be like driving on ice.  

Strong suggestion made by engine builder is the following: 351W stroked, aluminum heads etc. about a 450hp/450ftlb engine, 5 speed manual with 355 gear ratio.

I was thinking 5.0 stroked with turbo or supercharger with overdrive auto tran and 355 gears.  

Anyone have any thoughts on how much is too much engine-wise?  Does anyone know of a good looking fuel injection system other than stock?  (I think stock ford fuel-injection is visually ugly)  Thinking about the TWM setup with velocity stacks.  Have seen vastly different opinions on gear ratios in cars this light, what makes sense?

Thanks to all

hey angelo,

will send you a PM, but would like to come out and look at your ride.  Group of us in houston are getting ready to buy 2 or 3 kits.  Would like to come out and sit in one and maybe bring one of my partners in crime.  

One will be a true 427 big block build and one will be a fuel injected 351 or maybe stroker.  Trying to determine how much is too much on the horsepower front.  

J