Jack L

I think the oil filter is another indication that the block is later than 59, butmy memory is hazy.

With the vacuum gauge bouncing around at idle like that, you might want to peruse the info at this link... https://www.motor.com/magazine-summary/mastering-the-basics-reading-a-vacuum-gauge

Manufactures wanted the coil polarity such that the plug would fire from the center electrode to the ground. Later systems , HE, waste spark, etc., had enough "snap" that firing polarity was not a concern. As Sniper stated, there are times when you wouldn't notice it if wire incorrectly.

I was entertaining thoughts of picking up a set of, supposedly, NOS rods. Although the rods I was looking at are identified as 954428, the same as my current set, they are lacking the hole in the small end. A different application? A running change? An earlier, or later configuration? Or, what was referred to in the aircraft engine industry, a "suspected unapproved part" Thanks

51 thru mid 54 331s had the extended block. I know the Dodge and Desoto hemis were smaller blocks than the Chryslers, but am not positive about the block lengths. There's a few Hemi info sites that has any needed particulars. Hotheads comes to mind.

I remember them well, the body started rusting before it was time for spark plugs.

These Chrysler training series are corny, but there's good info n them.

Makes sense, didn't think of that. I'll assume that it's "non-stock".

I'm sure there's someone, or maybe everyone, in the group that knows what the function is of the circled device on the firewall. I don't . thanks

I think that's a Pratt & Whitney 28 cylinder

. The reason for the question was that I have a 25" engine that's a "transplant" in my 50 Windsor and there's no signs that the timing pointer was ever there. The identifying stamping on the block is pretty much obliterated, but was told that it was a truck engine. I've also seen pictures of some engines that appear to have never had it. There's obviously ways of timing it without the pointer, but I was just curious. Thanks. One of the attached is an industrial engine, and the other I'll assume is a military engine, being 24 volt.

I tried searching, to no avail, for any info about which engines used timing chain covers without timing pointers. I'm assuming industrial, and or truck engines? Thanks