I believe the aluminum flywheels are favored by the circle / dirt track racers as for fast rpm increase heading out of the corners. Mopar engines put out good torque by design so don't mind the steel flywheel on street or drag use. Thanks, Gary H. -----Original Message----- >> This brings up a question I have had and may help Knud in his decision. I >> know aluminum flywheels being lighter , will overcome inertia quicker >> therefor gaining RPM faster. In a big block B body with about 3:50 rear >> end ratio - 4 speed-5500-6000 RPM limit - about 375-400 Horse -any >> advantages or disadvantages to running an aluminum flywheel. Driven street >> and every so often on the strip? My thoughts: a 413 has enough torque to >> get you off the start line ( or from a stop sign) without the inertia of >> a steel flywheel. The aluminum flywheel would wind up quicker, Any >> experience out there with the aluminum >> flywheels?...................MO.......ew iowa ---- Please address private mail -- mail of interest to only one person -- directly to that person. I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic. Thanks! '62 to '65 Mopar Clubhouse Discussion Guidelines: http://www.1962to1965mopar.ornocar.org/mletiq.html.