Chevy cast iron intake manifold vs aluminum

[vpoirier79@hotmail.com]

I have a 305 sbc in a 76 monte carlo. It has sr torquer heads with a he252 crane cam and a spreadbore holly on a 300-38 holly intake and headers. The engine works well, hard to beleive its a 305. I've read a couple of mr vizards books, were I've read on the heads and the latest on the cast iron intake. On a 350, not much can take on the cast iron intake below 3000rpm and on a 283 or a 305 that may be as high as 4000rpm. My engines peek torque is about 3500 with it falling on its face about 5000, The heads and cam dictate that. My question is, Would I be better off getting a cast iron intake, and taking off the 300-38 holley intake. The 300-38 is old school, some say its a copy of the cast iron intake. Or is there another intake that will work in a range of off idle to 4800rpm. My car is big with 308 gears and 3900 lbs. Any suggestions here would be helpfull.

[rookie]

This is Davids latest intake articles maybe they will help with the choice.
Manifold Mania

I would lean to something with more modern day design, we have used a non RPM performer on a 327 and still made 425 horse at 6400 rpm.

So even though it is a small intake it still made good power.

[vpoirier79@hotmail.com]

Those intakes tested are for 1500 to 6500 rpm, not what i'm looking for. The regular performer might be a good choise, also the cast iron with a bit of porting might do the trick. I would still like to know if the 300-38 holly intake is ok, bad, or terrible

[Packard V8]

With your combination, RPM range, on the street, through mufflers, it is doubtful you would notice the difference between intakes. Don't spend your time, money or worry there.

thnx, jack vines

[Ol' CW]

IDK about that Holley manifold, so I can't answer that, but I do know aluminum intake is a heckuva lot lighter than the cast iron. And it's pretty much the highest part of your engine.

Also, the Performer EPS was designed with midrange torque in mind, so that may be a good option.