I don't know if this will help you much but here goes...
After doing some serious measuring and having a 94 intercooler in front of me to help a bit also I can tell you that it will fit in a 72 suburban! The 1st gen intercoolers will fit in the Burb also but I'm finding it hard to locate one used. I would thing that if a 1st or 2nd gen intercooler will fit in a 72 suburban it should fit in an older Dodge.
Bruce