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case only difference between BB vs SB 727? #1519924 10/19/13 12:06 PM 10/19/13 12:06 PM
Joined: Jan 2003 Posts: 2,872 CheddarHead till October weedlayer OP master
weedlayer OP master Joined: Jan 2003 Posts: 2,872 CheddarHead till October	My new 727 has some bolt holes off. Thinking my builder built a BB instead of a SB. Have not had a chance to check things real close but suspect that is the problem. Easiest fix might be to just change the internals to my other case if I can?

Re: case only difference between BB vs SB 727? [Re: weedlayer] #1519925 10/19/13 12:09 PM 10/19/13 12:09 PM
Joined: Apr 2005 Posts: 168 Torrance, Ca F Fig member
Fig member F Joined: Apr 2005 Posts: 168 Torrance, Ca	I'm not a 727 expert, but I cant think of one part that is not interchangeable. I lifted this off of another web site if you want to verify big or small block: It's EASY to tell them apart if they're not attached to an engine. Course, I take for granted you can tell a 727 apart from a 904 from the pan. However, big and small block 727s are simple to distunguish. The small block version only has two torque converter dust cover retaining bolt holes across the bottom of the bell housing. The big block version has four. Of course, the bolt patterns are different, but the dust cover bolt holes are an easy fast way to tell. ____________________ Read more: http://forums.moparmusclemagazine.com/70.../#ixzz2iBMbvBn8 Last edited by Fig; 10/19/13 12:32 PM. 1937 Plymouth R/S Coupe 440/727

Re: case only difference between BB vs SB 727? [Re: weedlayer] #1519926 10/19/13 01:10 PM 10/19/13 01:10 PM
Joined: Jan 2005 Posts: 3,635 Oakland, MI D dizuster master
dizuster master D Joined: Jan 2005 Posts: 3,635 Oakland, MI	Only difference is the case. All parts will swap.

Re: case only difference between BB vs SB 727? [Re: dizuster] #1519927 10/19/13 01:36 PM 10/19/13 01:36 PM
Joined: May 2005 Posts: 6,446 NJ-USA H HPMike master
HPMike master H Joined: May 2005 Posts: 6,446 NJ-USA	Quickest way to tell is the starter position... If you are looking at the converter opening with the input shaft facing you, the BB has a starter position around 3 o clock...SB is lower...like 4:30 or 5 o clock... MB

Re: case only difference between BB vs SB 727? [Re: HPMike] #1519928 10/19/13 03:09 PM 10/19/13 03:09 PM
Joined: May 2003 Posts: 1,751 Graham, WA P Polarapete top fuel
Polarapete top fuel P Joined: May 2003 Posts: 1,751 Graham, WA	Also, the mounting bolts for the struts on the SB case require a large diameter hole at 8 and 4 o'clock 1986 Dodge Ramcharger 440 2wd, Bracket Racer Under Construction 1998 Ram 2500 QuadCab, new daily driver. 2008 Honda Element 2014 Carry-On 7x14 Cargo Trailer

Re: case only difference between BB vs SB 727? [Re: Polarapete] #1519929 10/19/13 03:15 PM 10/19/13 03:15 PM
Joined: Apr 2011 Posts: 280 GEORGIA barracuda7199 enthusiast
barracuda7199 enthusiast Joined: Apr 2011 Posts: 280 GEORGIA	i always look at the dowel pin holes. small block is straight across from each other. big block the starter side dowel pin hole is higher than the other side.

Re: case only difference between BB vs SB 727? [Re: barracuda7199] #1519930 10/19/13 07:43 PM 10/19/13 07:43 PM
Joined: Nov 2004 Posts: 4,330 Lynchburg, VA Leon441 master
Leon441 master Joined: Nov 2004 Posts: 4,330 Lynchburg, VA	Quote: i always look at the dowel pin holes. small block is straight across from each other. big block the starter side dowel pin hole is higher than the other side. Ya beat me to it. Also you can measure the distance between dowels openings on the case and measure the dowels in the block. Career best 8.02 @ 169 at 3050# and 10" tires small block power.

Re: case only difference between BB vs SB 727? [Re: weedlayer] #1519931 10/20/13 08:14 AM 10/20/13 08:14 AM
Joined: Jun 2004 Posts: 138 central pa D darted1 member
darted1 member D Joined: Jun 2004 Posts: 138 central pa	If I remember correctly small block uses a bolt at the top center of bell housing to attach to the motor. the big block doesn't their top bolt holes are at like 11 0clock and 1 oclock so there shouldn't no bolt hole at the top of the big block bell housing. ED M

Re: case only difference between BB vs SB 727? [Re: darted1] #1519932 10/20/13 09:17 AM 10/20/13 09:17 AM
Joined: Jun 2004 Posts: 119 SE VA hemibee69 member
hemibee69 member Joined: Jun 2004 Posts: 119 SE VA	That is how I differentiate small to big block bellhousing. If it has a bolt at the top in the center it is a small block. Easy and quick to see. JiK 1969 Orig Hemi Super Bee Post 4 spd Red on Red (Sold sadly) 1970 Cuda Drag car 500" B1/BS 8.63 @ 155 mph 1970 Challenger SE 383 4 bbl A/C PB PS Leather 1971 Orig 440+6 Cuda 4 spd Shaker In-Violet

Re: case only difference between BB vs SB 727? [Re: hemibee69] #1519933 10/20/13 03:35 PM 10/20/13 03:35 PM
Joined: Jan 2003 Posts: 2,872 CheddarHead till October weedlayer OP master
weedlayer OP master Joined: Jan 2003 Posts: 2,872 CheddarHead till October	it's a BB case. I'll just move everything to my SB case. Thanks for the info. Guess I should have looked before I drug it under the car and tried to bolt it up. Last edited by weedlayer; 10/20/13 03:37 PM.

Re: case only difference between BB vs SB 727? [Re: hemibee69] #1519934 10/20/13 03:54 PM 10/20/13 03:54 PM
Joined: Jan 2003 Posts: 25,767 Rio Linda, CA John_Kunkel Too Many Posts
John_Kunkel Too Many Posts Joined: Jan 2003 Posts: 25,767 Rio Linda, CA	Quote: That is how I differentiate small to big block bellhousing. If it has a bolt at the top in the center it is a small block. Easy and quick to see. JiK No hole at top center. 7894218-Bllhsngswithtext.JPG (4455 downloads)

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