Anyone have casting numbers for 60, 61-2 alum bell housings?

[Tom P.]

Does anyone have the casting numbers handy for the 60 only and the 61-62 (-63 for 409 pass cars) alum bell housings?
I have a 60 housing on the 56, but the number is covered up by the Muncie.

[Gary C.]

Re: Anyone have casting numbers for 60, 61-2 alum bell housings?

Tom, FYI - there was a good thread about this very subject within the last 2-4 weeks. Gary....

[Tom P.]

Re: Anyone have casting numbers for 60, 61-2 alum bell housings?

Yep, I remember, but I didn't need the numbers then and I can't find it now.

[Gary C.]

Re: Anyone have casting numbers for 60, 61-2 alum bell housings?

Tom, links to previous threads. Gary....
https://www.forums.ncrs.org/showthre...using&uid=6104

https://www.forums.ncrs.org/showthre...using&uid=3496

[Mark P.]

Re: Anyone have casting numbers for 60, 61-2 alum bell housings?

3764591 for the 1960

[Tom P.]

Re: Anyone have casting numbers for 60, 61-2 alum bell housings?

Thank You So Much!!!!!!!!!!!!!

[Tom P.]

Re: Anyone have casting numbers for 60, 61-2 alum bell housings?

The 60-62 (-63 for 409 cars) open bottom housing numbers are 3764591(60 only) and 3779553(61-63).
As BEST as I can determine, the ONLY difference between them is the size of the hole for the throwout bearing fork.
The first picture is the 60 housing on my 56. The others are the 61-63 housing I have in the attic as a spare. As I understand, there is NOT, and never has been, a boot for the fork for the 60 housing.

[Dennis A.]

Re: Anyone have casting numbers for 60, 61-2 alum bell housings?

While on the subject of Bellhousings....What year and use was #3788421 for?

[Dennis A.]

Re: Anyone have casting numbers for 60, 61-2 alum bell housings?

found my own answer... 1963 with a different front bearing than later years. I had to stop and think about the muncie change over.

[Tom P.]

Re: Anyone have casting numbers for 60, 61-2 alum bell housings?

There are no longer many VIRGIN examples of 63 vehicles (Vettes or 409 full size cars) remaining to examine the front of the 4sp and bell housing.
BUT, here is what I and some others (NOT Vette people) have put together for 1963 ONLY 4sp cars:

For 63 Vettes ONLY, they all used the 421 bell housing with the small hole. The 421 housing only fits the small flywheel. The early production cars got an alum T-10 and the later production cars got a Muncie. BOTH 63 4spds had the small diameter front bearing retainer. Also, this means that ALLLLLLLLLLLLLLLLL 63 Vettes ONLY came with the smaller, 153 teeth flywheel. Correct???????????????????
For FULL SIZE PASSENGER CARS, it appears the same above configuration was also used for 3 and 4spds-------------------EXCEPT--------------the hi-perf 409 cars. Those cars used the open bottom alum bell housings (3779553) that were used on 61-62 Vettes. This bell housing was ONLY for the larger, 168 teeth flywheel. THIS 553 HOUSING HAD THE LARGER STYLE (62-earlier/64-later) hole for the front bearing retainer (bare with me, I'm going somewhere with this).
Soooooooooooooooooo, what this means is that 63 cars with the 409 engines would have had a larger front bearing retainier than what was on all other 63 T-10 and Muncies. And that is correct------------------as best as a few of us can determine. The front bearing retainer for 1963 4spds used with the 553 housing on 409 cars was 3741458.
Now, here is what is the ultimate point that I'm getting ready to make. The 3741458 front bearing retainer for the 4spds used in 63 full size cars was also the common as dirt front bearing retainer used on earlier and later 3sp trannys (NOT 63 3spds). If a person had a 63 Vette and did not have, or could not locate a 421 bell housing (smaller hole), but had a good 403 housing (these can be picked up at swap meets all the time for $5-20 all day long) with the larger hole, and they had a genuine, matching number 63 4sp, then the 3741458 front bearing retainer couls be used on a 63 4sp to mate it to the 403 housing with the larger hole.
Furthermore, if a person wanted to install a big, 14in diameter, 168 teeth flywheel and a 621 type housing, the above parts would allow the combination of a 63 tranny and big flywheel to be accomplished.
NCRS correct????? ABSOLUTELY not!
Functional? YES!

[Mike E.]

Re: Anyone have casting numbers for 60, 61-2 alum bell housings?

The 3779553 (61-62) also never came from the factory with a boot, even though parts houses will happily sell you one.

[Tom P.]

Re: Anyone have casting numbers for 60, 61-2 alum bell housings?

The 3779553 (61-62) also never came from the factory with a boot, even though parts houses will happily sell you one.

Mike,
You may be correct. I looked all over the boot that's in the 553 that I have and the ONLY number/logo that I could find was KF22. It looks and fits so good, it would appear to have been a GM boot.

[John N.]

Re: Anyone have casting numbers for 60, 61-2 alum bell housings?

The 3779553 (61-62) also never came from the factory with a boot, even though parts houses will happily sell you one.

Mike
The pass car with that bellhousing did have the boot.Mike do you know why the Corvette did not. Always wondered.
Regards