Thought of that. However, that's not really the issue. The restrictor plate is really only effective on the high end, and contrary to popular belief, these 450s run awsome above 3000 and pull hard to 7500+ without making the fella following you, eyes water. Really the top end is no trouble at all, runs great! Obviously, Tunnel rams aren't any good till 3000 rpm anyways but still it should run better than it does. Best i can figure is that I'm just not developing a good enough vacuum signal to run the carbs at lower rpms. My C/R is only 8.7:1 and i'm only about 292ci on top of that. Between all of that it makes approx 6" of vacuum at idle and as you roll off idle twards acceleration it'll drop as low as 3-4"!! The problem I'm having is not so much the immediate acceleration, but just past that as you'd roll into the throttle crusing down the road just above 2000-2200 rpms. I can easily duplicate te dead spot every time, just having a hard time figureing what to alter to make it smooth out.
Sooo.. I figured by reducing the venturi size (also dropping the cfm) would promote better fuel mixture and use of the weak vacuum signal. Or maybe not. Dunno, just taking shots in the dark at this point. I'm willing to bet that if I shortblocked it with more compression, say at least 10:1 it would probably improve the vacuum and idle quality. Or.... junk the cam and go wimpier (hoping it'd still eat the excess fuel at top end)
Now I know for a fact that the DZ Camaros (and Yunick Camaros) with the Trans Am 302s that had that cross ram intake ran dual 520 cfm Holleys, and ate every bit of the cfm thrown at 'em.
