1964 Valiant Slant 6 to 318 Conversion ?

As for leaks, the possible sources would be: a) front seal, b) dipstick tube, c) shift cable (there's trans fluid in the lowest six inches or so of the cable), d) kickdown lever seal, e) rear seal, f) pan gasket, or g) I can't remember if there's any trans fluid in the park housing, but if there is, then there's that, too.