Bellhouse Holes - The 1947 - Present Chevrolet & GMC Truck Message Board Network

57larry · 01-15-2010, 08:25 PM

I want to convert my 72 auto to a stick, I'm looking at a bellhouse from another 72 but noticed the the top 2 holes are threaded but the bottom 2 holes are smooth. how do you bolt the tranny in?

rick0312 · 01-15-2010, 09:42 PM

the top thread into the bell housing and the bottom just insert through bell housing and tranny and secure with a nut. I used all grade 8 hardware.

57larry · 01-15-2010, 10:34 PM

great photos to get the point across. thanks! do you use the bellhousing mounts or a rear tranny crossmember mount?

Dark Knight · 01-16-2010, 12:22 AM

The lower two tabs on the tranny should be threaded. At least mine are...

Blazer1970 · 01-16-2010, 06:40 AM

Quote:

Originally Posted by Dark Knight

The lower two tabs on the tranny should be threaded. At least mine are...

Yup, on the SM465 trannies of this era, the bottom two bolts go through from the inside of the bell housing and thread into the tranny. Later 465s did not have the holes threaded in the bottom, so you would have to use nuts to mate that combination.

57larry · 01-16-2010, 11:59 AM

I'm going to run a 4 speed, saginaw or muncie, so I guess i'll use the bot & nut

what do you run: a tranny crossmember or the bellhousing mounts?

rick0312 · 01-17-2010, 01:21 AM

I used the bell housing mounts. You'll need a pre 67 bell housing for the smaller bearing retainer. went through this myself check out thread. i posted a WTB on the board and was able to score the right bell for my 3spd man tranny.

http://67-72chevytrucks.com/vboard/s...d.php?t=292471

http://67-72chevytrucks.com/vboard/s...d.php?t=292867

57larry · 01-17-2010, 03:28 PM

all in all, wouldn't it just be easier to use an aluminum bellhousing and a rear tranny mount?

69 longhorn · 01-17-2010, 06:04 PM

Quote:

Originally Posted by 57larry

all in all, wouldn't it just be easier to use an aluminum bellhousing and a rear tranny mount?

I run the auto crossmember under my Richmond, & have used that crossmember under saginaw& Muncie 4spd trans in the past. Yes, I think that is the easier way,& it has not caused any trouble.....I DO prefer the cast bell made for the truck however. IMHO, you run the truck bell,& all the truck specific clutch linkage, ect & it all fits without mods to any of the linkage

There are several ways you can "skin the same dern cat"......so you have to use the method that works bestest for you

have fun with the project,crazyAL

01-15-2010, 08:25 PM	#1
57larry Registered User Join Date: Nov 2007 Location: Indianapolis Posts: 1,161	Bellhouse Holes I want to convert my 72 auto to a stick, I'm looking at a bellhouse from another 72 but noticed the the top 2 holes are threaded but the bottom 2 holes are smooth. how do you bolt the tranny in?

01-15-2010, 09:42 PM	#2
rick0312 Registered User Join Date: Jan 2006 Location: Warrington, PA Posts: 403	Re: Bellhouse Holes the top thread into the bell housing and the bottom just insert through bell housing and tranny and secure with a nut. I used all grade 8 hardware. Attached Images __________________ 69 C10 LWB GM 350 crate motor, 3.73 rearend

01-15-2010, 10:34 PM	#3
57larry Registered User Join Date: Nov 2007 Location: Indianapolis Posts: 1,161	Re: Bellhouse Holes great photos to get the point across. thanks! do you use the bellhousing mounts or a rear tranny crossmember mount?

01-16-2010, 12:22 AM	#4
Dark Knight Registered User Join Date: Dec 2008 Location: Pleak, Texas Posts: 420	Re: Bellhouse Holes The lower two tabs on the tranny should be threaded. At least mine are... __________________ -1967 Chevrolet Fleetside LWB- 350 V8 w/thumpr cam, NV3500, 3.08 gears, A/C, PS -1983 Chevy Silverado C1500- 383 stroker, TH400 -1989 Chevy Silverado K1500 SWB- 5.3L swap, 700R4, 3.42 gears -And a '66 Ford Mustang- 200 I6, C4 trans, rust bucket "The only thing we have to fear is fear itself." -FDR (and maybe rust too) You've gotta be able to stop and steer before you can go fast!

01-16-2010, 11:59 AM	#6
57larry Registered User Join Date: Nov 2007 Location: Indianapolis Posts: 1,161	Re: Bellhouse Holes I'm going to run a 4 speed, saginaw or muncie, so I guess i'll use the bot & nut what do you run: a tranny crossmember or the bellhousing mounts?

01-17-2010, 01:21 AM	#7
rick0312 Registered User Join Date: Jan 2006 Location: Warrington, PA Posts: 403	Re: Bellhouse Holes I used the bell housing mounts. You'll need a pre 67 bell housing for the smaller bearing retainer. went through this myself check out thread. i posted a WTB on the board and was able to score the right bell for my 3spd man tranny. http://67-72chevytrucks.com/vboard/s...d.php?t=292471 http://67-72chevytrucks.com/vboard/s...d.php?t=292867 __________________ 69 C10 LWB GM 350 crate motor, 3.73 rearend Last edited by rick0312; 01-17-2010 at 01:34 AM.

01-17-2010, 03:28 PM	#8
57larry Registered User Join Date: Nov 2007 Location: Indianapolis Posts: 1,161	Re: Bellhouse Holes all in all, wouldn't it just be easier to use an aluminum bellhousing and a rear tranny mount?



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