2 weeks away from sending the rear out and I can't decide which gears. I've had 3.42 to 4.11's so I know what to expect, it's just hard trying to figure out how the car will be mostly used. But wait, a buddy tells me he's found a 18 foot car trailor for 300$$. Who knows maybe 4.11 for the 1/8 mile track here. http://www.chevelles.com/forum/smile.gif

3:55 for a 14" tire and 3:73s for the 15".

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Dave (NY)
70 chevelle ss396 conv
66 chevelle ss396 hdp/conv
72 chevelle
55 chevy prostreet
69/71 camaros
61 impala bubbletop
TC member #493

3.73's!! http://www.chevelles.com/forum/smile.gif http://www.chevelles.com/forum/cool.gif


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-PaSCaLE

1970 Chevelle on its way up in the world.....

It's not what you drive that matters, as long as it doesn't use rice as a fuel...
http://www.pascale.org/Muscle_Cars/muscle_cars.html
Check out some nice cars...

[This message has been edited by PaSCaLE (edited 01-27-2001).]

3.73's for sure!!

I put 3.55's in my '71 and regret it now. Car runs great on the highway, but I don't cruise it anywhere since my gas mileage is ludicrous.

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Sean Thomas
TC Member #907
Sean's 1970 SS L34 (http://members.home.net/gorbe875/index.html)

I thinking about doing the same. I have a 3:31 rearend. Going to 3:55 wouldn't be much of a difference or should I go with a 3:73

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69greenmachine2 (http://chevelles.com/showroom/69greenmachine2.jpg)
69greenmachine3 (http://chevelles.com/showroom/69greenmachine3.jpg)
69greenmachineengine (http://chevelles.com/showroom/69greenmachine4.jpg)
69greenmachine (http://chevelles.com/showroom/69greenmachine.jpg)

IMHO going from 3.31 to 3.55 is a waste of time, I don't think you will even notice a difference. Go to at least 3.73.


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Chris Dagenais
Saskatchewan
'71 Malibu with a home built 454!
"Hard work MAY pay of in the long run, but laziness pays off NOW"
My Page (http://www.ycworld.net)

It depends on how you've built your engine, and the type of driving you plan to do. The 3:55s are the best compromise for both highway cruising and occasional strip use. If you plan to drive this car to work a few times a month, then maybe the 3:55s will be better for you. If you just plan to cruise it on weekends with occasional visits to the track, then go with the 3:73s.

If you like turning around 3000 rpms at 60mph with 27" tall tires go with the 3.73. I did. The only drawback is my friends like to drive 70-75 mph on the highway and I don't feel like turning the old 454 that much. They really pick up good out of the hole though.

The 3.55's would be a good compromise on the freeway though if you want to drive somewhere like Chevellabration.

Well the car will mostly see rod runs and cruising locally with a few runs at the strip. I was even thinking about getting another rear set up for the long hauls (ie.) the chevellebration coming up. And then have a rear set up for the regular use. I'd even through a set of 4.11's in but that would definately keep me from driving it to TN. in june. I'm checking into a trailor right now for those distant shows but it will be another 6 months or so before I sell a vehicle to get the truck that I want. What do you think?? The motor is a 30 over 396 rect heads 11.1 comp, Comp XE 574-284 cam soon to be m-22 going in or swapping to a 200-4r. I've got a set of 15" welds getting ready to go on and will save the factory mags for some of the shows. I'll probably put the BFG drag radials on the welds and swap wheels as needed. Thanks RandyB..

Hey tinman: That's a nice ride you got there. I was looking at the motor pic and was wondering if you've ever run the car with that breather off? I use to have abreather like that awhile back and was doing some tuning one day and left it off for a quick run, and was amazed at how much hp the motor gained when it was off. They really do choke the motor down quit a bit. Are you having a hood clearance problem? I would swap it out if you could. But like I said, that's a real nice ride you got there.

The dented breather didn't give it away did it? I've had clearance problems since I changed the intake and carb(holley dp). Used to have cast iron intake and edelbrock carb and I have since changed to an edelbrock triangle air cleaner and filter and rear of hood is about a half inch higher than the fender. Need to find a smaller triangle air filter, the one I have is 3".

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69greenmachine2 (http://chevelles.com/showroom/69greenmachine2.jpg)
69greenmachine3 (http://chevelles.com/showroom/69greenmachine3.jpg)
69greenmachineengine (http://chevelles.com/showroom/69greenmachine4.jpg)
69greenmachine (http://chevelles.com/showroom/69greenmachine.jpg)

[This message has been edited by TINMAN (edited 01-29-2001).]

4.10's

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"Being good isn't always easy...no matter how hard I try"
Big 'ol Baddass Dave Armstrong

'67 Chevelle 396/Th400/4.10
'95 Firebird Formula LT1(2FST4LOV)

The Burnout (http://chevelles.com/showroom/BBD1burnout.jpg)
The Launch (http://chevelles.com/showroom/BBDavelaunch.jpg)
The MAN!!! (http://chevelles.com/showroom/BBDave.jpg)(the guy in the black shirt)

I'll second that!! 4.10's WOOOOOOHOOOOOOOO http://www.chevelles.com/forum/biggrin.gif

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"Laissez Le Bon Temp Rouler' Cha!"
Chevytalk Moderator (http://forums.chevytalk.com/cgi-bin/ubbcgi/forumdisplay.cgi?action=topics&forum=1970-1972+Chevelle&number=52)
GMforums Moderator (http://discussions.gmforums.com/index.php)
"Jungle"Jim
70SS396 & 70 Malibu
My Car (http://hometown.aol.com/abayoukid/index.html)
"I don't drive FAST, I just FLY low!"

I have a 69 with 2 differentials set up for it. My 12 bolt has 3.73's and my 10 bolt has 2.56's. I can swap between the two in about 2 hours with a few breaks in there somewhere. The 3.73's go in when it is strip time, and the 2.56's go in there for crusing time. This is my alternative for a 6 speed. If you pull the axles out of the differential you can pull the brakes off at the backing plate and this will save you alot of time. There is a 1 second difference at the strip. but I get about twice the mileage at 75mph. Just a thought.

Yeah it's starting to look like the way I will go. I found another 12 bolt 2:73 chevelle rear here in KY for a 150$. Think I will take it and get the set up done and keep my other 12 bolt for everyday use. I think it'll be the 4:11's. Then maybe a 5 speed or overdrive later. Thanks for the comments guys.