JamesC

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Apparently the answer is "no".

My personal experience is "yes": '79 2-bbl in a Caprice, and the '86 3rd gen LG4 in my sig. But, many have said early 3rd gens ('82-83) had cast iron, as well as Canadien.

Just curious, why do you ask?

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82 Berlinetta, orig V-6 car, now w/86 LG4/TH700R4. 2.93 limited slip. Cat-back from '91 GTA, Accel HEI SuperCoil. AMSOIL syn lubes bumper-to-bumper. Daily driver, work-in-progress (LG4 w/'87 LB9 block, ZZ3 cam and intake, World 305 heads, Hooker headers & y-pipe, 3" Catco cat & 3" cat-back).
57 Bel Air, my 1st car. 0.030 over 396, 9.7 CR forged TRWs, Weiand Action+, Edelbrock 1901 Q-Jet, GK 270 cam, Magnum rockers, Jacobs Omnipack, 1-3/4" Hedders & 3" Warlock header mufflers, TH400 w/TCI Sat Night Special conv & Trans-Scat shift kit, LT MegaShifter, 3.08 8.2" 10-bolt w/Powertrax, AMSOIL syn lubes bumper-to-bumper. Best 15.1/95.5 @ 5800' Bandimere.

 

The one I'm driving today (78 El Camino) is cast iron. So, no.

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"So many Mustangs, so little time..."
ICON Motorsports

 

Five7Kid,

I replaced my stock alum with an Edelbrock.

JamesC

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I think the intake in my 305 is cast iron. (LO3)

 

The stock intake I replaced on my '83 T/A LG4 was definitely not aluminum.

And man, after 200,000KM, it was sure fun trying to pry it off to pop on the Performer.

Later,
Hype.

 

L03's have aluminum intakes

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92 Camaro RS 5.0 5-Speed
14" Open Air Cleaner
3.08 Posi-trac
Edelbrock TBI Intake
Crane cam
Ported & polished stock heads 3 angle valve job
HyperTech Chip
SLP Headers (Ceramic Coated)
UltraFlo cat-back exhaust

74 Dodge Dart Sport 360 (11.2 1/4 mile)

2000 Dodge 1500 Ram Sport

 

I swapped engines in an all-original, one-owner '82 Z-28 (two years ago) with the original carbuerated 305. It had the aluminum intake.

Which was leaking water at the back passenger side. Which had corroded an began to eat the aluminum.

Which evidently is/was very common on those aluminum intakes. Searched for two weeks for another stock intake and they were all corroded or ready to begin leaking.

Ended up putting on a Edelbrock Performer.
jms

 

I forgot to mention that many (if not most) of the 1970s 305s used cast-iron intakes.

Since most were factory painted, probably the easiest way to identify an aluminum intake is there is usually a cross-hatch pattern (similar to a tic-tac-toe board) just in front of the thermostat housing across the intake.
jms

 

Mine is stock aluminum from the 305, I believe all 305 carburated IROC's had the aluminum intakes.

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'86 IROC
T-TOPS, TINTED WINDOWS, BRAKE LIGHT BLACKOUTS
GM GOODWRENCH 350
EDELBROCK TES HEADERS
FLOWMASTER
EDELBROCK 600CFM CARB.
KN AIRFILTER
ACCEL HEI DISTRIBUTOR
160* Stat
2:73 GEARS
Rebuilt 700R4, with manual valve body
B&M Megashifter
Soon to be installed
Exhaust Cut-Out and different gears, either 3:73 or 3:42
"There is nothing more addicting than speed"

 

I guess the easiest way for me to tell what mine is would me to use a magnet, huh? I never even knew that it was a possibility. Never knew GM would use an aluminum intake on such a low performance V8. Guess you learn something new every day. Thanks.

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92 RS w/t-tops 305 TBI Auto.
170K miles and don't burn a drop o'oil
-K&N Truck filter #1500 w, open ele.
air cleaner
-Dynomax 2 1/2" cat-back
-B&M TransPak
-Jet Stage2 Chip
-180* T-Stat w/ 185* Fan Switch
-JVC CD--Alpine speakers & 4ch. amp
Rockford 2ch. to 2 MTX 12" subs