For anyone who has swapped a 340 with manual transmission into a 66 Dart

straying from the stock mount and using/modifying a 67 and up style piece takes a hard turn into modifying and customizing everything else in the whole apparatus. the z, the push rod, the bell mount, all that jazz.

which you then start veering into no-mans land.

getting a 4spd into the early cars it hard enough as it is, and dicking around with a mish-mosh of parts is just inviting headache after headache. and some ballaches for good measure.