anyone ever have a Dodge Rampage??

I have a 84 Rampage, and I would think you would have to put a full chassie under it to put the 318 in it. And from what I have read the 5 speeds only came in the 2.2 and the Calif. Shelby Rampage. And the only year for the CSR was 84. Mine has a lot of the options of the CSR, but haven't been able to prove it yet.