Slant 6 to 340 Engine Swap in 69' Dart

Trans bellhousing will be different, but a small block trans shouldn't be too tough to find. 7-1/4 will blow with a tough 340, so you are on the track for an upgrade there. I'd guess power steering and ac would be OK with right brackets, but no direct experience from me on that one. There are conversion mounts for the motor available.... try TransDAPT available at Summit, etc. Good Luck