[AL427SBF]

The war of BBF vs. SBF will forever rage on as both sides are quite polarized in their opinions of both. The bones of contention are -

- Engine weight and how that affects handling of one versus the other
- How fast it revs (time to RPM) of one versus the other
- How high it revs (redline) of one versus the other
- How much HP & torque created over RPM of one versus the other

A Dart 427w is a pretty popular choice for the SBF option, 520-550 HP seems to be pretty common on pump gas and they can be made to produce more depending on build. An all aluminum Dart 427w was my choice for a track performer with good street manners.

Any SB can be made to perform like a BB and visa versa, but when looking at these 2 motor types in general terms (significant numbers of each), and being of similar build quality and components, the strengths (or weaknesses) listed above clearly have a home with either the BB or SB, but not both. Again, generally speaking - when looking at a reasonable population of SBs and BBs, and where general characteristics of each can be quantified.

Seems to me if you want a motor that caters to handling and road course performance you go one way, if you want a motor that caters to straight line acceleration you go the other. Both motors do each well, but one is better suited to it than the other depending on what it is (again in general terms).

Don't forget the interplay of wheel size, suspension, gearing, brakes and driving style in your motor selection, you want the whole system to play well together.