Looking for some 65 beaumont 4 spd flywheel advise!

65sssd · Poncho Master!

Looking for some 65 beaumont 4 spd flywheel advise!

4SPEED427 · A Poncho Legend!

A few questions---

Is your original starter a long bolt and a short bolt in the nose?

Is this an L79 or a 300 horse? I was thinking an L79 would automatically be an 11" clutch which would be the larger ring gear.

I don't have my parts book open (may still run and get it) but wasn't an HD clutch available on 327? If so, I would think it would then be the larger ring gear.

Do you have pictures of your choices, or casting numbers of the flywheels in question?

65sssd · Poncho Master!

Carl Stevenson wrote:

A few questions---

Is your original starter a long bolt and a short bolt in the nose?

Is this an L79 or a 300 horse? I was thinking an L79 would automatically be an 11" clutch which would be the larger ring gear.

I don't have my parts book open (may still run and get it) but wasn't an HD clutch available on 327? If so, I would think it would then be the larger ring gear.

Do you have pictures of your choices, or casting numbers of the flywheels in question?

It's a little dark but one casting number is 8703870 and the other only has what I think is 281 on it. I could get pictures tommorow. What do you mean by a bigger ring gear and would that mean a bigger or smaller fly wheel? The aplication is 300 HP 327. Not to sure about the long or short bolt thing either.

4SPEED427 · A Poncho Legend!

Ok, that is likely 3703870 on there.

If you set the two flywheels on top of each other, isn't the one ring gear 153 teeth and the other one 168 teeth?

If so, they don't use the same starter. The 153 should use a starter that has two different length bolts holding it to the block. The 168 would use a starter that has 2 equal length bolts holding it to the block.

I may have time a little bit later tonight to dig out the parts book and I may be better able to narrow down what you need.

65sssd · Poncho Master!

I can tell that these don't use the same starter but which one is correct? Is my starter correct?The only fully intact 4 spd car I have is the 66 and I might have to pull the motor to find out. Are the automatic 283 starters the same as a 327 4 spd because maybe that's where I'm going wrong?

4SPEED427 · A Poncho Legend!

65sssd wrote:

I can tell that these don't use the same starter but which one is correct? Is my starter correct?The only fully intact 4 spd car I have is the 66 and I might have to pull the motor to find out. Are the automatic 283 starters the same as a 327 4 spd because maybe that's where I'm going wrong?

I will go get my books and see what I can find

4SPEED427 · A Poncho Legend!

65sssd wrote:

I can tell that these don't use the same starter but which one is correct?
It appears the starters will interchange because all 283/327 flywheels are the same, 64-67.
Is my starter correct?
If you are looking for authentic (numbers), then it appears you need 1108361 or 1107320, 327 only.
The only fully intact 4 spd car I have is the 66 and I might have to pull the motor to find out. Are the automatic 283 starters the same as a 327 4 spd because maybe that's where I'm going wrong?
They will interchange but I am betting the 327 has a bigger armature.

If I am correct in understanding what I'm reading in the parts book, the 14 1/8" flywheel must be from a later engine.

One interesting thing---

The L79 shares a pressure plate and flywheel with all 327's but the disc is different. I bet it had heavier springs.

65sssd · Poncho Master!

Thanks Carl. So the L-79 has a 10" clutch also? The good thing is the better flywheel matches the 283 flywheel. It should work but if I could find the one with the right part number I would buy it. I hope I can find one.

4SPEED427 · A Poncho Legend!

I am thinking that the listing is not perfectly clear because I would bet the L79 is a 10.5" disc. If I get a chance tonight I'm going to do some more book hunting. I was only in the Beaumont book last night.

I can hardly imagine the L79 being run with a 10" but that flywheel won't accept bigger than 10.5"

Beaumont4008 · Uber Guru

Also if you go with a bigger flywheel than 10.5, do you not need the 621 bellhousing ?

-- Edited by Beaumont4008 on Tuesday 22nd of March 2011 12:04:42 PM

4SPEED427 · A Poncho Legend!

Yes, good point, I believe so.

65sssd · Poncho Master!

So many different parts. Some will work, some are correct, and some are hard to find. What would a 621 bellhousing look like and is it much different? I seem to have two variations of them also. The place they look different is where the starter goes on mine. I'm not sure of the part number on any of them.

65 SD L79 · Canadian Poncho Superstar!

403 bell housing or a 383 will work with the 10.5 clutch. You will need the 621 if you want to go to the 11" numbers are on the side of the bell housing. They do repop the 621

Beaumont4008 · Uber Guru

The 621 has a defined cone shape leading to the starter the 403 is more squared off.

65sssd · Poncho Master!

Beaumont4008 wrote:

The 621 has a defined cone shape leading to the starter the 403 is more squared off.

Looks like I have a 383 and a 621. What is the 383 off of?

beaucarlo · Guru

I'm wondering about those cracks ........could be just heat-check cracks -common in used flywheels-have your machine shop check it ---resurface it ( careful there is a min thickness ) great project !!!

65sssd · Poncho Master!

I forgot to ask what the bolt configuration for the starter is and what the part number is? I know Carl said the 283 and the 327 were the same but what were they? The same bolts that hold it on or one is short and one is long?

65sssd · Poncho Master!

beaucarlo wrote:

I'm wondering about those cracks ........could be just heat-check cracks -common in used flywheels-have your machine shop check it ---resurface it ( careful there is a min thickness ) great project !!!

The bus mechanics at work told me that the cracked 14 1/8" flywheel is for a truck so it is for the wrong application. The good news is the ( 12 3/4") one is mint and ready to go. It will only handle a 10.5 clutch and the cheetah isn't a drag car for me. It will work fine and it is the same as the oem one. I still don't know the application for the 383 bellhousing?

4SPEED427 · A Poncho Legend!

The bolts for the 283 and 327 with 10.5" or smaller clutch/flywheel combo are unequal length.

327 with 11" clutch (GM called it HD clutch) only started in 67 on 327 according to the books.

If I am remembering right, the 383 bellhousing is for 64 or older and it likely has a smaller opening in it where the trans cone/nose fits in. I think if you check, a Muncie won't fit it if I'm right.

I ran a 10.5" in my 66 SS 327 Nova and I drove the tar out of it. It held fine but it may not be enough on the strip with sticky tires, which you say you aren't doing anyway.

2drpost · Uber Guru

Carl Stevenson wrote:

I am thinking that the listing is not perfectly clear because I would bet the L79 is a 10.5" disc. If I get a chance tonight I'm going to do some more book hunting. I was only in the Beaumont book last night.

I can hardly imagine the L79 being run with a 10" but that flywheel won't accept bigger than 10.5"

my L79 chevelle was a 10.5 clutch

65sssd · Poncho Master!

69 belair wrote:

Carl Stevenson wrote:

I am thinking that the listing is not perfectly clear because I would bet the L79 is a 10.5" disc. If I get a chance tonight I'm going to do some more book hunting. I was only in the Beaumont book last night.

I can hardly imagine the L79 being run with a 10" but that flywheel won't accept bigger than 10.5"

my L79 chevelle was a 10.5 clutch

Do you still own it or do you have any old photos? Thankyou in advance for your response.

2drpost · Uber Guru

don't have it, still exists...

4SPEED427 · A Poncho Legend!

69 belair wrote:

my L79 chevelle was a 10.5 clutch

Do you know that because of how many new ones you had to order???

2drpost · Uber Guru

got wise, had a schiefer clutch in it, i think my left leg is still stronger than my right...