thunderchicken
Grandmaster
Yes 3 chambers for the street. Minimum 2.5"s on pipe OD all the way back on anything 350 CI's and under. Even a stroker.
Big blocks need 3's at least.
I had dual chamber on the 65 Biscayne as it was a serious piece designated to just be pissed off mean and evil. I have the headers for the 64 and am still mulling over mufflers.
Since the subject of mufflers has come up, let me just throw this out there. CM-keep this in mind too- IF anyone has or is planning to use Nitrous, blower or turbo(s), it is very important to make sure the engine can get those hot exhaust gasses out. If your header tubes and exh system doesn't flow enough it can and will hurt parts.
I know my stuff is a bit extreme by some comparisons but just as an example our header tubes are 2 1/2" going into a 6" collector with a coffee can sized 6"in 6" out muffler. Exhaust flow can be equally as important as induction flow