396 to muncie 4-speed bell housing - Team Camaro Tech
Team Camaro Tech join team camaro
 
Camaro Parts at SS396.com     
GROUND UP & SS396.com         
Official Sponsor of Team Camaro
   

Auto Insurance



Registered users (free) do not see these large ads

Transmission & Driveline Transmissions and Differentials

Reply
 
Thread Tools Display Modes
  #1  
Old Feb 19th, 08, 06:42 AM
5636randy 5636randy is offline

Randy
 
Join Date: Feb 2008
Location: Oklahoma City USA
Posts: 4
Default 396 to muncie 4-speed bell housing

You all have been great help here in the past so my learning continues! I have a 396 cast code 3855961 65-66 engine and a muncie m20 case number 3851325. I need to know what bell housings will put these together! Also clutch & pressure plate recommendations!
Thanks again!
Randy
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old Feb 19th, 08, 07:00 AM
Eric Kammerer Eric Kammerer is offline
Senior Tech

 
Join Date: May 2004
Location: Southeast PA
Posts: 8,302
Default Re: 396 to muncie 4-speed bell housing

You're probably going to want to search here, because there are a lot of good threads about setups for BB and stroked SB.

The factory BB setup used a bellhousing with a casting number ending in "621", which housed an 11-inch clutch and 168-tooth flywheel (vs the 10.4-inch and 153-tooth used behind most SB). You can look for a decent 621 on ebay or at swap meets, but they sell between $100 for one that may have some issues (small cracks, stripped inspection cover threads, etc.) up to $250 or so for a cherry one. Doesn't make a whole lot of sense, because the bells are not date coded, but some sell for some pretty decent money.

There is an alternative OE bell, the "697". The only issue with that one is that there are two positions for the throwout pivot, so you have to be sure to use the correct one.

There are now reproduction "621" housings available, and I have read good things about them. Just about any repro parts vendor like Ground Up or Rick's should carry that.

The flywheels can be hard to come by used, but your looking for a 168-tooth flywheel for an internally balanced (vs. the externally balanced BB like the 454). You can get them in different materials and weights, but for street driving it is tough to beat a good steel OE type flywheel.

Clutch choice really comes down to how you plan to drive the car, and what kind of build up you're doing on the engine. I have a McLeod Dual Performance 12-inch clutch, which is just a little bigger than the stock 11-inch, but fits within the 621 housing. It is bar none the smoothest, strong clutch I have ever owned, and because it is a diaphragm style, won't wear out your leg on the street. My BB is pretty mild, roughly equal to the L34 396/350, so this style clutch is enough for me. Plenty of guys running higher torque engines are running dual-disc clutches.

You also need to make sure you get the throwout fork that works with 1st gen F-bodies. I have the part number in my notes here if you need it, but it might come up in a search here. It is still available from GM.

Start with a search here on "621" and see what info you get. There's plenty of info on different setups, including which starters work with which bellhousings.
__________________
Eric
69 'vert project big block/TKO 600 RR
68 'vert driver RS clone -- gone!
Reply With Quote Quick reply to this message
  #3  
Old Feb 19th, 08, 11:14 AM
bob560 bob560 is offline
Tech Team

Bob - '68 SS396
 
Join Date: Nov 2007
Location: DFW, TX
Posts: 63
Default Re: 396 to muncie 4-speed bell housing

I have a 396 mated to an M20. Your years may be a bit older than your Camaro, but they fit should be the same. I just got the repro "621" bellhousing (along with clutch fork, throwout bearing and a bunch of other things) from Ground Up Restorations. The bellhousing is very nice! Total runout on mine was about .007", which is plenty good to mate with a Muncie (though a TKO would have meant using offset dowels to get it closer). Worked perfectly for me.

For clutch, I've got what I believe to be a stock heavy duty AC Delco 11" kit. Someday I may change it, but it works great, and the pedal feels real nice, so I'm in no hurry.

~Bob
Reply With Quote Quick reply to this message
  #4  
Old Feb 20th, 08, 05:45 AM
5636randy 5636randy is offline

Randy
 
Join Date: Feb 2008
Location: Oklahoma City USA
Posts: 4
Default Re: 396 to muncie 4-speed bell housing

Thanks agian for the input Bob & Eric! This engine & tranny are actually going in a 65 Impala SS. Eric, I could use the part number for the correct throwout fork for this and as far as clutch goes, I don't plan to drive this car radically or anything. A weekend ride. The engine I have I am told should be delivering about 450hp, whether or not that is true I can't say. I am new to this restoring obviously! Thanks!
Randy
Reply With Quote Quick reply to this message
  #5  
Old Feb 20th, 08, 10:45 AM
Eric Kammerer Eric Kammerer is offline
Senior Tech

 
Join Date: May 2004
Location: Southeast PA
Posts: 8,302
Default Re: 396 to muncie 4-speed bell housing

Oh, okay. I don't have a part number for a B-body (Impala) throwout fork, and it may not be as critical. In an F-body, things fit pretty tight and one wrong bend of the fork can mean it hits the floor. I'll see if any of the parts books I have list a B-body fork.
__________________
Eric
69 'vert project big block/TKO 600 RR
68 'vert driver RS clone -- gone!
Reply With Quote Quick reply to this message
  #6  
Old Feb 21st, 08, 09:35 PM
neverendingproject69 neverendingproject69 is offline

 
Join Date: Jun 2006
Location: SF Bay area
Posts: 23
Default Re: 396 to muncie 4-speed bell housing

I would agree, Ground UP has the best price on the Reproduction "621" bellhousing. ($169)
Reply With Quote Quick reply to this message
  #7  
Old Feb 22nd, 08, 06:42 AM
sspecialk sspecialk is offline
Gold Lifetime Member

Scott
 
Join Date: May 2005
Location: North Carolina
Posts: 341
Default Re: 396 to muncie 4-speed bell housing

Bob560, I am not quite to the point that you are but was curoius about the run out thing. How did you go about checking that? I too bought a repro 621 to house my 11" clutch and want to make sure I am close as well. Thanks for the info.
Reply With Quote Quick reply to this message
  #8  
Old Feb 22nd, 08, 12:07 PM
pdq67 pdq67 is offline
Banned

 
Join Date: Apr 2000
Location: Columbia, MO USA
Posts: 21,341
Default Re: 396 to muncie 4-speed bell housing

Here you go, all the info DZAuto, (Tom), has posted over on Team Chevelle.

Have a good read.

"DZAUTO’s bellhousing link.
http://www.chevelles.com/forums/show...ellhousing+101
However, GM cast literally millions of the 460 486 bell housing to cover the larger flywheel and clutch in 1970's light trucks, both 6 and 8 cylinder. The problem is the Muncie SM 465 truck transmissions had a 5 1/8" (5.125) front bearing retainer, so you can't use it with the smaller car transmissions.

Luckily, a 4 11/16" x 5 1/8" bushing is available from Novak part # BR-4 (about $40) at www.novak-adapt.com or 877-602-1500.

Dennymac, (Dennis), also sells these here. He recently said “I appreciate the recommendation. If you want to include me as a friendly supplier of these adapter rings, I get $28US delivered for them. My contact information is cell phone 502-558-1043, and email is aguy@dennymac.com Best of luck.
Thanks again. Dennymac Dennis McLeod

I bought one of the adapter rings, and used the truck bell housing, which cost $25 at my local salvage yard, where they use the truck bell housings for door stops.

The 486 dust cover is GM part #340 254.

pdq67
Reply With Quote Quick reply to this message
  #9  
Old Feb 22nd, 08, 12:22 PM
Microgiant Microgiant is offline
Senior Tech

Timothy
 
Join Date: Sep 2007
Location: San Antonio TX
Posts: 1,804
Default Re: 396 to muncie 4-speed bell housing

If you have a high performance motor or plan on racing you might want to consider getting a lakewood safety bellhousing. Those stock ones can let clutch parts fly out if it explodes.
__________________
My 69 RS/SS 396 Project - www.easymoney69.com

"I may be dumb but I aint stupid"
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply
Team Camaro Tech > First Generation Camaro Info and Tech - 1967- 1969 "Where it all started" > Transmission & Driveline      Current Topic: 396 to muncie 4-speed bell housing
Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Team Camaro Tech forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address.
NOTE we receive a lot of registrations with bad email addresses. IF you do not receive your confirmation email you will not be able to post. contact support and we will try and help.
Be sure you enter a valid email address and check your spam folder as well.

Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Display Modes

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -7. The time now is 06:21 PM.



Camaros.net - 2009 AutoForums.com