340 in a 65 plymouth valiant

Yes it will fit as said.First check to see if you have the V8 centerlink as they did put them in 6 cyl cars also.I bought engine mounts from Schumacher for the V8 swap.I found it to be an easy swap other than cutting for my 1 7/8 tube fenderwells.Ofcourse TTI makes 1 3/4 tube underchassis headers now.:banghead:Good luck.
View attachment 66 Dart project Nov2010 311.jpg