Dang, looks right. I'm assuming Gen V takes a different flywheel than a IV because the part number is different- 3993827 but they show it to be identical in size. Wrong flywheel in box? Probably need DZAUTO on this one.

 

First of all, let's get our dimensions correct before proceeding!
There is NO SUCH THING as an 11in flywheel for a Chevy V8. There are ONLY 13in (actually about 12 3/4in-small-153 teeth) and 14in-large-168 teeth flywheels.
The small flywheel will ONLY accept a 10.4in clutch and the large, 14in flywheel will accept an 11in clutch (there is a 12in clutch for trucks which requires a bell housing with the extra big bulge on the bottom).

Sooooooooooooooo, those are the ONLY two sizes of flywheels for Chevy V8 engines. Period.
ALLLLLLLLLLLLLLLLLLL (with a couple of RARE exceptions) Chevy BB engines only got the large 14in flywheel, which will only fit into a 621 type bell housing (or a 444 or a 697 or a truck housing). Period.
Also, other variations in flywheels are ONLY at the center of the flywheel. The center hole and the bolt pattern changed for later generation engines (86 for SBs and 91 for BBs), BUT NOT THE OUTER DIAMETER!!!!!

Therefore, if you have the large, 14in diameter flywheel for an 11in clutch, and you have a 621 bell housing------------------and they don't fit together-----------------------I have no clue what could be wrong!
So, go back and check it again. Lay the flywheel down on a flat surface (floor) with the ring gear down and place the Keisler repo 621 housing over it. If the housing will fit, you have the right combination. If not------------------I have no clue!

 

So, go back and check it again. Lay the flywheel down on a flat surface (floor) with the ring gear down and place the Keisler repo 621 housing over it. If the housing will fit, you have the right combination. If not------------------I have no clue![/QUOTE]



Let's be clear he doesn't have a KEISLER he has a Ground up. Big difference.

Mine works!

 

So, go back and check it again. Lay the flywheel down on a flat surface (floor) with the ring gear down and place the Keisler repo 621 housing over it. If the housing will fit, you have the right combination. If not------------------I have no clue!

Let's be clear he doesn't have a KEISLER he has a Ground up. Big difference.

Mine works![/QUOTE]

Gene,
Is there ANOTHER 621 repo besides the Keisler???????????????????
I was TOTALLY unaware of that, if so. I thought the one from GU was the Keisler housing! The Keisler housing is the only one that I'm familiar with.

 

Now I don't know who supplies the GU bellhousing but as you can see in the images - a 14" flywheel fits nicely in this 621 repro bell which I purchased from GU.

 

I bought a Keisler 621 for my 67 with a 14" flywheel and everything fit perfectly. I bought mine at the Keisler both at Carlisle 2 years ago and have not had a problem at all. Very happy with it.

Bruce

 

knock knock, Roberty you there? Let us know what the problem is. We're all still learning.

 

I KNOW that the genVI uses a different flywheel than the MarkIV.

I have a feeling that the GEN V & the GEN VI use the same flywheel.
Not positive, but I believe so.

I have a Mark flywheel outside and it is WAY different than the GEN VI wheel

Might have a look into that

 

Figured out the problem. The starter is different on the straight shift cars vs. the automatics. Sorry about the confusion guys... Pulled the auto starter and all is well. I always thought that a Chevy V8 starter was a Chevy V8 starter. :noway: Learn something new every day. :beers:

 

Robert,
A Chevy V8 starter IS a Chevy V8 starter!
The difference is in the NOSE of the starters!
Any starter for a 14in flywheel/flexplate must have the staggered bolt pattern for attaching it to the bottom of the block. BUUUUUUUUUUUUUT, ONLY one nose with the staggered bolt pattern will work. It must be the cast iron version. A starter with a cast iron nose and staggered bolt pattern will fit EITHER a 621 style bell housing for a manual tranny, or an auto tranny with the 14in flexplate. But a starter with a staggered bolt pattern and alum nose will ONLY FIT an auto tranny! :thumbsup:

 

Bought the correct manual transmission type starter and got the new clutch assembly, bell housing and transmission installed along with the new starter and got the clutch linkage taken care of. I've got to shorten the driveshaft 1 1/2" and put new U joints in it this weekend so I'm getting close to having this 4 speed conversion completed. Thanks for all the help guys and especially DZAUTO. :beers:

 

Just for the heck of it, while we're on the subject of bell housings, flywheels and starters, I was at my local O'Reilly store yesterday and checked on starters.
I SPECIFICALLY asked to take a look at TWO starters. One for a 70-72 BB with auto and one for a 70-72 BB with 4sp. BOTH were rebuilt DELCO cores (which is exactly what I wanted to see). The one for the auto tranny had the alum nose/staggered bolt pattern and the one for the 4sp had the cast CAST IRON/staggered bolt pattern. Both were also Hi-torque starters (which they should have been). Both were the same price (kind of surprised me). I was VERY pleased to see the parts guy pull out the right ones!

 

Autozone brought out two different starters and both were for automatics. The guy kept arguing and I just walked out.
Went to Advanced Auto the guy looked it up and showed me the notatation of with or without manual transmission. Had it for me the next day. Like you found Tom, it was a rebuilt Delco with the iron nose!:thumbsup:

 

I bought my starter from Advanced Auto Parts and it was the rebuilt Delco with the cast iron nose. Damn thing sure was heavy. Almost seemed twice as heavy as the automatic starter.

 

Why the difference in starters? I assume they are both dimensionally the same.

Does having a manual trans stess the starter case that much more?

 

Go back and look at DZAUTO's post.

 

And I really want the old 11" aluminum open bottomed 409/'Vette bell housing b/c I could drop a clutch in 1/2 the time of the old round one like the 621 b/c it doesn't have to come off!

Please post him a pic of what I'm talking about Tom.

pdq67

Best Car Insurance | Auto Protection Today | FREE Trade-In Quote

 

And I really want the old 11" aluminum open bottomed 409/'Vette bell housing b/c I could drop a clutch in 1/2 the time of the old round one like the 621 b/c it doesn't have to come off!

Please post him a pic of what I'm talking about Tom.

pdq67

What would the casting number for this open bottom bell be?

 

A starter aint a starter.A manual car starter has a slanted nose to fit inside of bellhousing.An auto starter has the bigger nose which wont fit inside of Manual bellhousing.You can use a manual car starter if swapping from manual to automatic but you cant use an original auto car starter for an auto swap to manual.END OF STORY.Ask me how I know.I had this problem in the 80s with my Nova.Have a good day

 

Just ask Tom!!

pdq67

Best Car Insurance | Auto Protection Today | FREE Trade-In Quote

 

You sure that last number isn't 3779553 like this? Whew - you were right about those being pricey.

http://cgi.ebay.com/ebaymotors/OEM-...essories?hash=item56316f8324&_trksid=p4506.c0.m245&_trkparms=65:12|39:1|72:1171


http://motors.desc.shop.ebay.com/it...0.l1313&_dmpt=Motors_Car_Truck_Parts_Accessories&_odkw=3779553&_osacat=0&_rdc=1

 

You sure that last number isn't 3779553 like this? Whew - you were right about those being pricey.

http://cgi.ebay.com/ebaymotors/OEM-...essories?hash=item56316f8324&_trksid=p4506.c0.m245&_trkparms=65:12|39:1|72:1171


http://motors.desc.shop.ebay.com/it...0.l1313&_dmpt=Motors_Car_Truck_Parts_Accessories&_odkw=3779553&_osacat=0&_rdc=1

You're correct, and I just now changed it.

 

OK, here are the two different 60-63 open bottom alum bell housings.
The 3764591 is 1960 ONLY! The 3779553 is 61-63 (61-62 for Vettes).
As I mentioned above, the ONLY difference I can find between them is the size of the opening for the throwout bearing fork.

I have a 1960 3764591 on my 56 Vette. The top picture is the 60.
The other pictures are the 61-63 3779553. As best as I have been able to determine, there is NOT, and never has been, a boot for the fork for the 60 housing. Only the 61-63 housing had a boot.