[68c10airstream]

I'll throw my 2 cents worth in, i can't tell by the pics if those mounts will allow the motor to move around if the rubber splits apart. I believe the clam shell style doesn't allow the motor to move very far if the rubber splits. I used the 2001 organ donor mounts and made my own adapter plates. My style serves a couple of key items in my mind; new style mounts are designed to address nvh (noise vibration harshness) and more importantly are safe and if the rubber splits movement is kept to a minimum. My style sit fairly low, a/c compressor fits perfectly down low, no header clearance troubles, looks tidy. If i was to do it over again i would source mounts and brackets from a 98-02 f body 5.7 ls application. Nice cast iron brackets attach to the side of the block and the mount i would call a biscuit style. You would only need to make a small bracket from the under side of the biscuit to the crossmember. Stock manifolds from a trailblazer 5.3/6.0 and possibly other gm applications would work and any header would clear the mounts. Also replacement mounts sometimes come from india and are rock hard and can slit open. I'm old enough to remember gm recalling defective mounts that when split apart resulted in full throttle in reverse. Gm fix was cables from exhaust manifolds to the frame. If you can fabricate and weld i believe you will be happier with the f body set-up, if not dirty dingo will work fine. My viewpoints will probably come under fire by a frequent visitor here but a common sense approach sure worked great on my 5.3 in my 68c10. Good luck, Brian Fuller