what all has to be done to install a 1972 chysler 413 cid into a 1984 swb dodge pu.?

Question

i have a 1972 champion motorhome that has a great running 413 cid motor. On the breather it states " 265 hp 413 cid" I believe that i have a 727 behind it. the 1984 dodge pu has a slant 6 with a 3 speed manual with an overdrive. what problems will I be looking at if I do this swap? thank you for your assistance

Answer 1

Your biggest challenge will be with the steering linkage and the exhaust system. Getting the auto tranny shifter hooked up isn't too bad, and you can probably find a junkyard driveshaft from a V8 shortbox truck to fit. The 413 is a very wide engine (much wider than the 318/360 that was available with your truck. Motor mounts will likely have to be fabricated. I would go with custom fabricated headers (kits available from Hooker or Flowmaster). If you have some fabrication experience, you can make them up yourself, otherwise, find a good hotrod shop. The 413 from the motorhome is good for low end torque, but don't expect to get huge power from it or good mileage. You can make some changes to get it up into the 300+ HP range (heads, cam, carb) without a huge expense, but you might be better off in the long run trying to find someone looking for a big block to trade for a niice high revving 318/340/360 for your truck.

Answer 2

You are looking at problems with driveshaft lenght, K-frame swap out, Motor mount swap out, and a floor shifter or change out the steering column. That is just for starters. The 413cid will have a 727 behind it.