I've about decided on the Comp Cams Magnum 280H...230/.230 and .480/.480 lift.
It's for a 69, M-20 4-speed, 3.73's.
406 sb, 5.7" rods, 195 AFR's, RPM Performer, Q-Jet, 9.5 cr, headers...will see an occasional 5500 arps.
1) How is the idle quality? (I'm guessing this cam would be smoother on a 406 than a 350). Would you say it's:
2) How is the vacuum? I do have power brakes. Probably need 12# or more at idle.
Thanks in advance!