Packard Forum Index » Post-War (1946-54)

Hi all, Yes, a 327/288 crank will fit into the same block ...just need the correct rods for the crank...288 rods for a 288 crank, etc. With regard to fitting 288, (327 has same block, bored out 60 thou for a bit more torque ) to 282 vehicles, Packard put out service instructions on fitting the 288 to the pre-war 282 engined vehicles. I have already put them into info.com sometime past. There is no great problem with it and it is a Packard approved mod. As previously mentioned, you need to fit a front engine mount plate from the 282 engine. There is also a bit of rework on the gearbox mounting holes in the 282 gearbox cross member. It gets a bit more complicated fitting an OD to the 38 and earlier 120's but there are plenty running around. I would not recommend fitting an Ultramatic to a pre-war Packard under any circumstances.

Worked for me. You do have to use the harmonic balancer from the 327 though. I used solid lifters, and had the cam reground to a mild street grind. The rods from the 327 will have to be reused as well. Pistons are the same size.

The 327 crank worked fine for me. I had it ground before reusing. Forgot to mention, you have to use the 327 cam, not the 288 version.

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I'm a bit confused by the reference to the 327 being "bored out" relative to the 288. My understanding is, the 327 had the same bore as the 288 (3 1/2 in.) but was stroked (4 1/4" rather than the 288's 3 3/4" stroke). Am I misreading or misunderstanding something here?

Beginning with the 22nd series all the engines had a common bore, 3-1/2 inches, and this remained the case thru 1954 with the sole exception of the "359" engine which was 3-9/16.

Hi all, Sorry for the confusion. The bores are all 3.5 inch. I mentioned the 60 thou oversize as a slight increase in displacement available with regard to piston replacement sizes from the normal suppliers. Best regards PT