There is a lot of confusion on what frame and engine mounts GM used in the Camaro.
There were three thicknesses of engine mounts, the left mount according to the article below was used on all 307 and 327 low perf engines 67-69. My 67 327/275 has the middle ones, and I've had my Camaro since it was new in Oct 1966.
The center mount is for 67-68 high perf 302, 350, 396 engines.
The right hand 2 1/8" tall mount is for 69 302, 350, and 396 engines only.
The early Camaro engine mounts were not interlocking type, at least on the low perf engines. They just had a block of rubber glued between two plates of metal and would tear allowing the engine to lift up. The fan would hit the shroud and the engine could even hit the hood. There was a danger of the engine pulling on the throttle linkage and having an "unintended acceleration" event.
In 1969 the factory installed interlocking mounts on the high perf engines only. These mounts are thicker and required a shorter frame mount to keep the engine where in the correct position.
Years later interlocking replacement mounts came out for the earlier engines. They do not interlock as well as the Z/28 and BB 1969 mounts do. (see middle mount in photo at bottom of page)
In 1971 there was a recall campaign to install a cable restraint system to hold the engine in place in the event of a motor mount falure. NHTSA CAMPAIGN ID Number 7IV235000. They list the potential number of vehicles Affected at 6,682,084!
http://www.nhtsa.dot.gov/cars/problems/recalls/recmmy1.cfm once there use the search link on the left, search on "Chevrolet - 1967 - Camaro" when prompted.
This link should take you to directly to the results page of NHTSA without searching.
HERE IS A TRANSCRIPT OF THE ABOVE RECALL NOTICE If the above recall links do not work, click here to read it on my page.
The above chart uses latest part numbers available at the time of publishing, which was early 80's. Origonal motor mount or frame mounts may have different numbers which are superceded by these "currently available" numbers.
"These are the heights of a set of big block brackets in a car I have.
1. Driver's side is 2.5 inches from base to the top of the bracket. It measures 1.75 inches from base to center of the bracket bolt hole. It is GM part # 3950113.
2. The passenger side bracket measures 2.0 inches from the base to the top of the bracket. It measures 1&3/8 inches from the base to the center of the bracket bolt hole.This is GM part # 3950114.
These measurements were taken in the car but should be accurate. - Bob."
http://www.camaros.net/forum/Forum9/HTML/009013.html link to quote above.
My 67 was a 327/275hp and uses 3955183(L) and 3980938(R) frame brackets. The height from frame to center of mount hole is R-2 1/4", L-2 1/4".
69 High Performance Frame Brackets 3945507(L) 3945508(R) the height to the hole is 1 7/16"(L) and 1 1/2"(R)
NOTE: The short frame bracket below has four spot welds on top, this is for a reinforcement underneath that encloses the bottom of the engine bolt.
Only 69 and later "short" brackets have this feature.
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The above frame sb frame brackets are used with rubber engine mounts that are 1 5/8" from hole to block face, and measure 2 5/8" wide. This corresponds to the middle mount in the photo above with the oval hole in it. I believe this mount may have been used on most 67 -68, and 69 low perf small blocks.
The 69 hi po rubber mount on the right, is an interlocking mount that measures 1 1/8" from block to mount hole. Note the two rivets and rubber coated interlocking plates on it's left side.
The center mount may be a replacement for the stock non interlocking mount on the left. You can see it only has a tab on one end, I guess this helps to keep the rubber from tearing apart. I still would not trust it.
This is the Energy suspension motor mount (3.1114G) which comes with a must-use reinforcement plate under it. This extra thickness may cause some alignment problems with your power steering adjuster bracket. The two bolt type - low perf ps bracket may fit under the mount and use a washer to space the third hole. Be sure to use longer bolts for full thread engagement.
Here is the big block Z bar, it is 9.5" from left to right, lower
(clutch end of the arm) is 7" long, upper arm is about 3 3/4" long
overall, not to holes.
SB photos will follow.
Here is a link to discussion of clutch rod lengths and widths. http://www.camaros.net/forum/Forum9/HTML/006170.html
3912573 TH 400 BB crossmember tubular type, $55.75 list price still available from GM.
3899006 is for use with 3sp, 4sp, th350, pg has rounded bottom hole for trans bolts.
There was a BB Manual trans crossmember, it is thicker and has a squared off hole on the bottom for the trans bolts.