1932 cylinder head distributor mount?

Posted by Sherlock On 2019/12/31 16:59:09

I have two cylinder heads for my 740. The spare is clearly a 1930. The one that was installed on the car is evidently off a later year as it uses 14mm plugs and has "HC" stamped on it. This head also has a three-bolt distributor to head mount instead of four bolt as used with the 1930 head.

My question is what year did Packard switch from the four to the three bolt mounts, and did the 1932 mounting bracket change in design from the one used on 1930. I ask this because the mounting bracket on my 740 is the same two-arm style as used with the 1930 Northwest 10868 distributor, yet it differs from a typical 1930 bracket in that it mounts using three bolts instead of four. From what little I have been able to glean from photos on the web, the mounting bracket used in 1932 is of a different design, perhaps with only one arm.