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Author Topic:   Intake for 305
ZachmanJ
Dirt Full Roller

Total posts: 38
posted March 25, 2004 10:13 AM  
Chevy made several stock aluminum intakes, I have one #373598, it looks like a stock 2bbl intake. I think it's off a late '70s 307. They also made aluminum 4bbl intakes. They're about 30 lbs lighter than the cast iron ones. Hope this helps...loojack

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"loojackracing, a not for profit organization"

loojack
Dirt Maniac

Total posts: 196
posted March 25, 2004 03:34 PM  
Found my casting no. book, 373598 is for a 305 2bbl, 1978-81. Try 458520 it's for 82-87 305/350 Q-jet. 14014432, says it's for a 1981 350 Z-28 Q-jet. Not hi-po, but 30lbs off the front of a nose heavy car will help.loojack

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"loojackracing, a not for profit organization"

racer17j
Dirt Forum Champ
Total posts: 5390
posted March 25, 2004 04:08 PM  
it's kinda pricy but worth the cost. brezynski makes some awsome power with their stock intakes. i know from experience

M1
Dirt Freak

Total posts: 257
posted March 25, 2004 06:23 PM  
i cant see how a brezynski would be benificial on an engine with valves smaller then a briggs and straton...lol

Im assuming you run a 4 barrel???

a 305 is limited alot by the valves, and poor flow quality of the heads. Just get a aluminum intake, and call it good.

ruggs66
Dirt Maniac

Total posts: 193
posted March 26, 2004 08:45 PM  
M1 you still using the small valve heads??

gotta get some heads off of a Wagon!! mmmmmmmmm big grocery getter race parts!

M1
Dirt Freak

Total posts: 257
posted March 27, 2004 08:48 AM  
I have either 434's or 601's on mine now. I cant remember which...

ruggs66
Dirt Maniac

Total posts: 193
posted March 27, 2004 10:13 AM  
I like the 601s Or the 416s.
the 081 305 heads are ok also.


ZachmanJ
Dirt Full Roller

Total posts: 38
posted March 29, 2004 10:10 AM  
the 601s have the smallest chamber so they would make good compression on your engine.

the 416s & 081s flow the best if you want to run higher rpm.

be sure to check the valve size before using them since some came with small valves.

I believe most 80s Camaros had the 416s & flattop pistons.

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