I recommend Oliver pro billet rods... We spin the 557" to 8,100 rpm at the traps!

Cheers,

Arnie

67 Cuda 8.48@ 158.7 mph 1.18 60' 2,600 DA(so far...) 70 Super Bee 440 Six Pack 4-speed. 13.2 @ 104 Stock exhaust/Street tires.