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In this Discussion
- crazyjones September 2010
- Lee ODell September 2010
- Oldcar_Mechanic September 2010
1967 chevy impala
-
Hi all
I am looking at getting a 67 chevy Impala, and I had a few questions for you guys.
The Impala I am looking at getting has a 327 Engine, that will most likely need to be replaced, and a 2 speed automatic transmission, again most likely will need to be replaced. so, here is my question, would it be possible to put a 4 speed automatic tranny onto the 327 Engine, or am I stuck with the 2 speed? if so, how much does a new/rebuilt 4 speed tranny cost?
any other information any of you may have on the car will also be greatly appreciated, thanks -
Why do you say that the engine and transmission will likely need to be replaced? The 327 is a very good and reliable engine as is the Powerglide transmission.
Yes you can replace the automatic with a 4 speed but, think of all the things that you will need to do to accomplish this.
You need a transmission, clutch with bell housing, linkage which includes the shaft that will go from the frame to the bell housing. The pedal and the components under the dash that the pedal swings on.
Your best bet is to get a parts car to get all you need.
Good luck with the project and you can get a lot of help and information at chevytalk.com
Ron -
I'm with Ron. The 327 engine is a very good reliable engine and the 2 speed trans is a good trans. Unless the engine has a rod knock or leave a smoke screen behind, it should perform well for you.
When I got my first 327 El Camino, unknown miles on engine, it ran rough. It had a bad Holley carb. Got 13 MPG. Changed to Carter 625 and gained almost another 8 MPG. With some other fine tuneing the gas milage increased to 26 MPG. That was back when the speed limit was 55 MPH and the gas then gave better gas mileage than it does today. And it had plenty of power.
I assume you are talking about changeing the trans with a 700R overdrive automatic which is a 4 speed. It will bolt onto the 327. The flex plate will need to be changed for attaching the lockup torque converter. The drive shaft will have to be shortened and rebalanced. The trans crossmember will need to be moved back. However, the most critical part of the changeover is gettling the TV cable adjusted properly for the trans to operated properly. Many a 700R's have gone to TRANNY HEAVEN because the TV cable was hooked up improperly.
Prices are all over the board from junk yard to very expensive. Find a local transmission shop near you with good reputation.
Something else that will make it a better car to drive and handle would be to instal bigger anti sway bars on front and rear suspension. That is a big heavy car and they tend lean alot on corners. That will make it handle much better. Not just a little better but alot better. Like the difference between night and day, so to speek.
Good luck. Have a good day. Lee -
the reasonI think It will need to be replaced, is because the one i am looking at hasn't been driven in lik 15 years, and it hasn't been started in around 2 years. It allready has a leaking gasket, and who knows what else has worn out or rotted away in the last 15 years. also I would like to change the transmission because, from what I understand, the 2 speed gets crap MPG and the 4 speed will get much better Milage.
I appologize for my lack of knowlege, but could you tell me a little more about these sway bars? are they just something that attaches to the suspension? are is it a complex system? thanks -
I have worked on many cars that have sat for far more time then yours and can say that without getting the engine running you will not know what condition it is in. I have gotten many of he cars that have sat running perfectly fine and with little work. It's all the other things that deteriorate that will bite you.
If you preferr to have a different engine that is fine and you should be able to get a decent dollar for the 327 and the Powerglide.
The best thing to do in my opinion is to analyze what you have before you spend loads of money and time on anything.
After that many years you will be needing to spend a lot of money on the brakes, with rubber flex lines and cylinders and possibly lines. Also you will need to go through the carb, hoses, radiator, fuel lines and gas tank. Put your money where it works best for you.
And don't worry about your knowledge because we all have been there and had to start somewhere. It's great to see people get into the hobby and have some fun with it and I hope you have a load of fun meeting people.
Ron -
Ditto what Ron said. Get it running first. And take care of all the rest of what he mentioned. Especially the brakes.
The anti sway bars are easy bolt on.
Lee
