Ok here it goes. I am swapping a 5.7 hemi into a 66 coronet that has the original 727 small block. I read the thread on swapping the hemi into the"ole mopar" here on moparts. I have the exact SFI flex plate called out in the article right down to the part number (P5153753). Today I held up the flex plate to my torque converter and it is about an inch off in the bolt patterns. The SFI plate is about and 1" too small for my converter. I don't know much about torque converters. Can someone clue me in? Do I need to get a smaller converter? What size did the 66 coronet come with? I read that there might be an issue with the 66 model 727 having a different number of splines than the 67 and newer. help I am drowning over here! I am ready to drop that 5.7 hemi ins and can't!