Guys with 200-4Rs...
Thread Starter
Race Director
Joined: Mar 2001
Posts: 11,601
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From: San Francisco CA
St. Jude Donor '07
Guys with 200-4Rs...
What did you do with the exhaust? I want to add straight duals on my '75 (well, dual cats anyway) but I'm not sure what kind of supports I can use with this. Custom built mounts? Rework the original? 
Race Director
Joined: Jul 2004
Posts: 12,706
Likes: 329
From: Scottsdale Arizona
I'd think that you'd be best off with a simple, custom support. It wouldn't take much to take a strip of metal from the tranny mount and fabricate one. With dual cats, you wouldn't be able to use the standard center support even if you could hook it up in the standard position (which you can't).
Melting Slicks
Joined: Apr 2000
Posts: 2,005
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From: Ridgecrest CA
I have seen people talk about taking the stock crossmember and redrill something to just make it work. I have been wondering this same thing.
By my looking, it looks like you would have to redrill the frame for the crossmember mounting points and the crossmember for the tranny mounting points. I don't mind doing the latter, but the former makes me kind of nervous. These frames are not the most solid as-is, and I would be hesitant to move the crossmember without some professional analysis.
By my looking, it looks like you would have to redrill the frame for the crossmember mounting points and the crossmember for the tranny mounting points. I don't mind doing the latter, but the former makes me kind of nervous. These frames are not the most solid as-is, and I would be hesitant to move the crossmember without some professional analysis.
Safety Car
Joined: Aug 2001
Posts: 3,685
Likes: 202
From: Waterford Mi
With my 73 I didn't have to do any mods to the stock exhuast but I did loose the bracket that mount to the old TH400 trans that supported the exhuast pipes so now I have a little rattle once in a while. I should weld a support to the crossmember to fix it someday. You might be better off buying the one that BTO sells.
Safety Car
Joined: Dec 2005
Posts: 4,270
Likes: 20
From: Central Michigan
Originally Posted by Gary's 1977 Vette
I used the 400 cross member on my 200R and it bolted together just fine and I ran the exhaust just like it was with the stock tranny. NO PROBLEMS
Did mine the same way
However if you have to pull the trans, the BTO would make things much easier
