273 to 318

[wedgie]

I am sure that this question has been asked before, but here goes. What all need to be done to replace a 273 with a later 318 in and early "A" body? Will the trans bolt up? What 273 parts (waterpump, oil pan, etc.) can be reused on the 318?
Thanks guys.

 

[Hell_Fish]

You will have to use the 273 water pump. Everything else should fit. Why are you swapping? The 273 is a great engine and will get tons better mileage that a 318.

 

[BobsDart]

When you say later...pre magmun or magnum??? Either will bolt up to the trans... Not 100% sure with the balance of the magmun??? Pre-magnum just swap out the water pump, I'd replace with new one... Use all the accessory brackets and pulleys. I just switched to the later style water pump and radiator, passenger side exit. Also the timing tab from the 273 should be swapped.Oil pan, as long as it is a center sump you are okay... rear sump should work too...

Bob
64 Dart 270 2dr post
360/904

 

[66dartgt]

Depending on the year 318 the register for the torque converter on the back of the crank might be larger, if so have an adapter made.

 

[cavemanmoron]

Depending on the year 318 the register for the torque converter on the back of the crank might be larger, if so have an adapter made.

 

[custom100]

I did this swap with my 65. If I remember the 273 stuff we used was the water pump, the 90* oil filter adapter, the kick down linkage for the trans, oil pan, and we had to machine a pilot bushing for the engine trans mating.