I love centrifugal blowers, (I’ve had three myself) they are a great compliment to a late model EFI car or truck. Near stock drivability and 100-200hp increase with a little tuning is not difficult.
I would be curious if that kit (or any factory bbf kit) will fit in the limited confines of a cobras engine bay. Do a search for ByronRACE here on CC. He built a Vortech blown West Coast years ago, it was a quite a fabrication project .
Project Ludicrous Speed
I think taking your motor to 545-557ci (4.500 stroke @ 4.390 or 4.440 bore) with a ported SCJ or P51 head @ 10.5-12 to 1, nice solid cam (or a roller), single plane and a bigger carb or EFI rig would be a fun package.
“easily produce 700 to 800 HP out of a 302 cubic inch displacement. With the Twin Screw blower you do not need big displacement or RPM.”
I disagree: 700-800 hp from 302ci requires A LOT of everything! Aftermarket block, Big flowing heads, High dollar rotating assembly, a big blower, race fuel and RPM. Yes it can and has been done, but the motor will be a peaky, high maintenance and temperamental (sounds like my X wife) Not the making of a good street motor.
And that is the beauty of the 385 series BBF. We can make those numbers naturally aspirated on with a stock block, an $800 Chinese forged crank, good alum heads and possibly on pump gas!
Jason