Next Question? Rochester Carb Replacement ? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**70cst** · 03-25-2002, 07:24 PM

Now that you all have educated me on the factory Rochester cfm rating...What carb do you suggest in replacing the factory carb with. My original carb 30years old plus is beyond rebuild. Engine is a 402BB with headers and mild cam.
Thanks Again,
Dewayne 70cst

69 longhorn · 03-25-2002, 07:29 PM

For the difference in cash,i would use a 750 edelbrock. They are also a very reliable carb.....got one on my 383.....69 longhorn.

**COBALT** · 03-25-2002, 08:18 PM

Yeah, I'm going to do the same thing one of these days. I don't know if I'll go to the 750 (seems like a bit of overkill until I can get the large chambered heads and higher lifting cams), but I'm definitely going to a much larger intake and Edelbrock carb. Imagine what that will be like after having that little Rochester 2G with stock manifold! That truck is going to come alive.

------------------
'69 3/4 ton C20 2wd w/ 350ci/400THM and a wood bed!
'69 3/4 ton Custom 20 2wd w/ ORIGINAL 350ci/4sp Manual and a wood bed (parts beast).
Seattle, WA.

*See pics of my trucks and project at www.webshots.com!

lukecp · 03-25-2002, 11:13 PM

I have a Edelbrock #1406 on my 350, and i like it alot. It gave me some more power, but i dropped a few MPG. I need to play with the jetting a little bit though. Overall, it is a big improvement over the Qjet i used to have on my truck. The 750cfm model should feed your big block just fine.

------------------
Lucas

drop_shift@hotmail.com

My Daily-Driver: '72 Chevy LWB Custom/10. Rebuilt 350, 300 HP thanks to a few go-fast goodies. Ochre with a white top. Future plans include a frame off restoration, and maybe a blown 383.

03-25-2002, 07:29 PM	#2
69 longhorn Registered User Join Date: Aug 2001 Location: rock island,il,usa Posts: 5,382	For the difference in cash,i would use a 750 edelbrock. They are also a very reliable carb.....got one on my 383.....69 longhorn. __________________ http://community.webshots.com/user/hotrodhorn

03-25-2002, 08:18 PM	#3
COBALT Senior Member Join Date: Sep 2001 Location: Seattle, WA, USA Posts: 5,817	Yeah, I'm going to do the same thing one of these days. I don't know if I'll go to the 750 (seems like a bit of overkill until I can get the large chambered heads and higher lifting cams), but I'm definitely going to a much larger intake and Edelbrock carb. Imagine what that will be like after having that little Rochester 2G with stock manifold! That truck is going to come alive. ------------------ '69 3/4 ton C20 2wd w/ 350ci/400THM and a wood bed! '69 3/4 ton Custom 20 2wd w/ ORIGINAL 350ci/4sp Manual and a wood bed (parts beast). Seattle, WA. *See pics of my trucks and project at www.webshots.com! __________________ '69 3/4 ton C20 2wd-350ci/TH400 '69 3/4 ton Custom 20 2wd-350ci/4sp Manual '99 2wd 5.7 Chevy Tahoe Seattle, WA.

03-25-2002, 11:13 PM	#4
lukecp Formerly yellow72custom Join Date: May 2001 Location: Austin, TX Posts: 7,531	I have a Edelbrock #1406 on my 350, and i like it alot. It gave me some more power, but i dropped a few MPG. I need to play with the jetting a little bit though. Overall, it is a big improvement over the Qjet i used to have on my truck. The 750cfm model should feed your big block just fine. ------------------ Lucas drop_shift@hotmail.com My Daily-Driver: '72 Chevy LWB Custom/10. Rebuilt 350, 300 HP thanks to a few go-fast goodies. Ochre with a white top. Future plans include a frame off restoration, and maybe a blown 383. __________________ '72 Chevy C10 Mild 350/TH350/3.07. Ochre/White. Old high school ride. '70 GMC C2500 '62 327 4bbl/SM465/4.56-geared Dana 60. White/White. Project or parts truck. '97 Saturn SL DD. 1.9/5-speed. 40+ highway mpg

03-25-2002, 07:24 PM	#1
70cst Senior Member Join Date: Feb 2001 Location: New Madison, Ohio Posts: 21,342	Next Question? Rochester Carb Replacement ? Now that you all have educated me on the factory Rochester cfm rating...What carb do you suggest in replacing the factory carb with. My original carb 30years old plus is beyond rebuild. Engine is a 402BB with headers and mild cam. Thanks Again, Dewayne 70cst __________________ A husband can be right...or...A husband can be happy. 67-72 Chevy and GMC Trucks...The Classic Truck for the Classic Folk. 1970 CST Two tone green, 402BB, 400 Automatic, Tach, Buckets, AC, AM-FM, Tilt, GM CB, GM 8 Tract, LWB, etc JOHN 17:3...The better side of "LIFE" Remember: Everyday is a good day...Some are just gooder!



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.