Does anyone have a pic of how these things mount? There are no holes in my x-member where the bolts go I guess I will have to drill my own.

 

Are you talking about the exhause pipe hanger for duel exhaust? If so, the bracket uses the transmission mount holes.

 

I found a picture on cc. I don't have the holes that they used in this picture.

http://www.parts123.com/parts123/yb....Z5Z5Z50000050D

 

The picture of the Corvette Central hangers looks, well lets just say there is a better way to do it without drilling holes in your frame.

I just went through this on a 77 4-speed car that is getting converted to true dual exhausts with 2 1/2-inch pipes.

I used a pair of factory 2 1/2-inch factory rams horn exhaust manifolds
A set of front 2 1/2-inch pipes for a 63-65 small block 4-speed car
A set of rear 2 1/2-inch pipes for a 68-74 big block car
A set of 2 1/2-inch magnaflow mufflers for a 77 car
The center exhaust hanger for a 4-speed car with 2 1/2-inch pipes.

I got everythng except the hanger and the manifolds from Corvette Central. It all bolts on with no welding and fits perfect.

Get the hanger that fits your application. For example if you have 2-inch pipes with an automatic, then buy the hanger for that application and install it. It fits directly under the tailhousing of the transmission.

If your car has a TH 350 automatic, you may have to slot the holes in the hanger. If you have a 4-speed or TH 400 transmission, the correct hanger is available and will just bolt on. You don't have to drill holes in your frame. I'm not sure about overdrive tansmissions.

 

I am putting on 2 1/2 inch true duals with headers and have a th-350 trans. These seemed like the right ones.

 

If that's the case, the Corvette Central hangers in your original post may be the way to go.

One of the tradeoffs using headers is that the collector flange on your exhaust pipes is usually welded on in front of the crossmember and you can not remove the exhaust pipes from the car without cutting them.

 

I was going to have a joint at the trans x-member so that I could pull them off without cutting them when I need to get them off.

 

Transmission mount bolts.

 

I have this same kit and I’m in the process of installing it. I think Corvette Central expects us to drill holes in the cross member to accept their clamp/hanger setup – something I’m not crazy about doing. Davies has a hanger for our application. It’s spendy but I may give it a shot.

http://www.corvetteparts.com/details/iid/13338501.htm

Anyone know how this thing mounts? Does it go between the transmission mount and cross member, below the cross member or ???

 

I drilled 1 hole in the xmember for it. Then just used the self tapping bolts it came with on a drill to get it threaded.

 

I did the same thing....