383 in a 69 Dart 4-speed

Use the spool mount K if it's a small block. Go to www.bigblockdart.com and check out the tech pages on how to build your own Direct Connection k-member (D.C.).

The bell will depend on which trans you have (different bearing retainer sizes).

Oil pans are out there.

Your driveshaft will work IF you already have the four speed in the car (or if it's for the four speed).