318 to 360 swap screwed up big please help!!!

No dont do that! It will take out the bearings in the motor eventually, not to mention trans seals, bearings and its just a bad bad idea.... Do yourself the favor of maybe trying to sell some parts and come up with cash to get the correct flex plate. I bought mine from summit. I actually sold the original style 360 flex plate when the last trans went. I sold it for like 30.00 on ebay. Check there.
Once you have the correct flex plate you can run the typical toque converter. You wont have to fork over money for a new converter.
I wish you well man. I know how it is to be broke and have an expensive hobby. This is when it pays to start thinking creativly on how to raise cash. LOL Craigslist all your spare parts of list em here. Take the cash and buy at summit!