Chevy SBC 350 400 BBC 454 2PC RMS 11" 168 Tooth DNA Billet Black Oxide SFI Flywheel Kit includes adapter plate to

Kit includes adapter plate to permit use of certain square bore style carburetors

so you are good to go

Speedmaster pumps draw just 5

Speedmaster small block 427 c

They are five times stronger and more ridged than stock because they are made from aircraft grade aluminum alloy

Chevy SBC 350 400 BBC 454 2PC RMS 11" 168 Tooth DNA Billet Black Oxide SFI Flywheel Kit includes adapter plate toSpeedmaster billet steel flywheels are fully CNC machined from a high tensile aircraft material billet steel. The high carbon steel material is incredibly strong and can withstand the rigors of the most extreme engines, drivers, and road conditions. Grab one of these Speedmaster billet steel flywheels for the durability and performance that you demand.