Roots vs centrufical blower

Throwing an idea out here.... How would a littlefield 10-71 to a 14-71 blower be vs a f2 procharger as far as a 521 to a 528 cu in engine setup? The motor would be a wedge style headed deal at 8:5 - 9:1 compression range. Changing boost levels will be a must as far as mild for the street and turn up the boost for the track. Getting some ideas here for a new motor build. Seems even doing a 14-71 would yeild the best all around but not sure. Motor would only be turning 7,000 to 7,500 max rpms I am guessing, but nothing I would have to spin to the moon for any power.

There are a lot of factors involved, I believe the F2 would make more power, but the roots would make more down low and reach peak boost quicker.

I kinda figured the F2 would produce more top end. I want a broad range, even if I only top out at 6,500 rpms I know the roots will have the TQ to get my butt moving quick, fast and in a hurry at low rpms

I only have experience on the 4.6 liter motors with forced inductions, the big block is a whole different beast.

Eric:
You should go with the Procharger. Be kind-of cool if you could get it under the stock hood.

Here are a couple of pics I shot when I laid my procharger D1B down into my Turbo Coupe. looks like it will clear the stock hood o.k. as well as the fender and frame rail.
I just need to build the BBF stand-off bracket. The setup I have is for a BBC that I plan to adapt to a BBF.

Thanks for the pic, boy is that a tight fit.

you can run 4.70's EASILY with an F2. the Roots blowers are cool and yes make good power but depending on chassis configuration and track conditions the F2 might be a better option. You mentioned broad torque range, you are talking a big block with a blower, I don't think that is really a problem with either.

changing boost on an F2 is easy because you can run a wastegate to control boost levels. no worries about changing cogs.

intercooler setups are easier with the F2 unless you want to run alky with the roots deal.