Ron,
I summarized Joe Padavano's old posts to this list re: motor mounts at:
http://www.ucalgary.ca/~csimpson/Tech/Mounts.html if it is at all helpful.
You say you are putting a 455 "back" into a 69 Cutlass but a 69 Cutlass
should not have had a big block in it to start with so I'd _ass_u_me_ that
you have the small block pads. Ergo, you would want the small block motor
mounts.
That's what I was really thinking, but couldn't remember exactly what Cliff
had posted a long time ago.
If your car had a SBO originally, use Sealed Power 270-2261 for the BBO.
Milton Schick
1964 442 Cutlass
[EMAIL PROTECTED]