Question about BB 4speed crossmember

nuch_ss396 · #1 03-24-2006, 04:14 AM

[ QUOTE ]
The exhaust is also laid in at an angle in the BB.Where it is straight on a SB.Jeff

[/ QUOTE ]

Jeff,

On the X-member, what about the exhaust issue are you referring to?

Steve

Ohio427 · #2 03-24-2006, 05:24 AM

Ed & Steve, The only picture that I have is one taken from under the car showing only the oval opening and the two transmission bolts offset to the passenger side of the opening. I tried to accessing my web picture hosting site but keep getting an error message. Either they are down or kaput. Steve, If the part numbers on on the top of the flange, I don't believe that I'll have access to see them with everything being in the car. I know for sure that the engine is on BB engine mounts and is offset by about an 1" to the passenger side of the engine compartment. I just can't see the engine lining up to a SB Xmember with the engine in that position. I'm still waiting for someone to tell me if the two holes in a small block Xmember is centered in the oval opening or offset towards the passenger side like mine. If you think that the picture that I have of the oval opening would help, I can email you the picture. By the way thanks for your help. much appreciated.
Darrell

Ohio427 · #3 03-24-2006, 06:41 AM

I forgot to ask. Does the same BB 4 speed crossmember fit all three years 1967-1969?

Nova Research Project · #4 03-24-2006, 04:59 PM

Ohio427;

I have sb and bb crossmember pictures on my site on a transmission crossmember identification page. The focus is the Nova, but they used the same sub frame. It does not go into differences (if any) by year, but provides a way to see the crossmembers side by side.

The pictures are right under the transmission code table on this page: Nova Crossmember Identification

Greg R.

nuch_ss396 · #5 03-24-2006, 05:09 PM

Greg,

That's top-notch documentation you have on that site.

As the saying goes, a picture is worth a thousand words.

Steve

**YENKO DEUCE REGISTRY** · #6 03-24-2006, 06:05 PM

There is a 1/2" offset towards the passenger's side on the BB Xmember. You can use SB engine mounts with a BB Xmember, you just have to muscle the tail of the trans over to get the bolts to line up. Every 4speed Yenko Deuce was built this way!

Z28DZ · #7 03-24-2006, 06:06 PM

[ QUOTE ]
I forgot to ask. Does the same BB 4 speed crossmember fit all three years 1967-1969?

[/ QUOTE ]

To the best of my knowledge, yes.

Ed

Ohio427 · #8 03-24-2006, 08:03 PM

Greg, great site you have there. The pictures tell me what I wanted to know. The picture of the SB crossmember is exactly like mine. It shows the bolt holes to the right of the opening. I just don't understand how mine bolted up with BB engine mounts and SB Xmember. Do you guys think that I should replace the SB with a BB xmember. I worry now that with this combination that I am putting undue stress on some part of the drivetrain whether it be the rear end, transmision or engine itself. It just seems like something has to be taking the force of the 1/2". I have put over 500 miles on this setup and haven't noticed anything unusual like an engine or drivetrain noise or vibration.

**YENKO DEUCE REGISTRY** · #9 03-24-2006, 09:51 PM

Your setup is fine, there are deuces with 100k+ miles on them with the mis-matched components - without problems! The universal joints make up for any alignment issues. I'm not sure I'd be throwing a set of slicks & caltracs on there, but for 'normal' usage it will be ok.

Ohio427 · #10 03-24-2006, 10:58 PM

Marlin, Thank you. That's what I have been wanting to hear. I'd hate to go through changing anything when everything runs well as is. With my luck, the new & right crossmember would probably not line up while I had no problems with the wrong Xmember. I was just afraid of something developing in the future because of this. This site is truely a treasure of knowledge. Thanks to all.

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