152 ci Motor

The 504 engine is derived from the A, B, C design. Lots of parts interchangeability among those engines.

The distributer may be the only thing that is swappable between a H and 504.
 
(quoted from post at 15:58:20 08/25/11) Is the 152 in the H the same as the 152 in the 504?

While the Hand the 504 use engines that have the same bore and stroke they are completely different engines. Because they already had a 152 CI engine in the H when the engine for the 504 came out it was listed as a C153 to tell them apart.
 
Not even close. The 153 is a sleeveless version of the 135. The 135 is the same design as the 113/123 in the A,B,C, and super series.
 
The 504 engine is basically a 113 from the A/B/C without sleeves, thats what I'd always heard anyway.

internal CI is the same as the H, but the block is smaller on the 504.
 

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