Re: Need recommendations for BBC 496 combo
great spot for a roller cam. even a hydraulic roller with quality lifters at that RPM. 3200 and a stick opens up some options for you. RPM Air Gap, HP950 carb, keep the header tube size reasonable, no more than 2", maybe 1&7/8". Iron heads, don't go over 10:1 so you don't get trapped in some bad gas deal. Forged pistons for the NOS deal. Buy a cam from UD Harold here on this site. His phone # has been posted several times. something around 240@.050, 110 LSA. There'll be lots of options. Any quality roller rockers will work, I'm still partial to the Crane Golds, they're still out there. I'd avoid the various off brand/ ebay miracle deals there.
3200 and a stick, you're in a good spot to build a little more aggressive combo but I'd keep the CR lower to allow more aggressive tuning options and fudge against any further deterioration in the gas quality. You can get a little more power with higher CR, but if you have to back off the timing and fatten up the carb to keep the pinging under control that HP is gone and it costs you money and power every time you drive the car. IMHO, YMMV, others may differ, etc, etc.
Tom Terrific or Terrible Tom, depending on the phase of the moon, passing cosmic rays or other factors not fully understood except by my wife.