The 5.7 and 6.1 Hemis will fit Small block mopar bell housing. If you are going with a 727 behind one of these new engines you will need a spacer to push the trans back so the converter does not damage the pump.
I used the new conversion flex plate. You don't need the spacer any more. The 8 1/4 will hold up as long as it's not abused. If you drive it like Ms Daisy a 7 1/4 would hold up. You must use an original sb K frame to use the conversion mounts.:-D
