Typically the overdrive cars also had a different rear axel ratio which provides faster starts from a full stop and more power at lower speeds. The non-OD ratio was something of a compromise so best to change the rear end too.

I used to drive my 1940 110 all over the state of Washington in at least a 100 mile radius from where I lived and even drove it down to San José, CA when I moved there in 1972. It was my resume when I applied for a machine operator job when I was 20 as it showed my mechanical ability after having disassembled and reassembled it as a teenager. Good driving and zippy car and if I wanted to get it back, it is available once again on Facebook Marketplace and still with the same JC Whitney tires it had in the ‘60s! I still have the original seat upholstery and wiring harness too. This car, which was originally a bright blue, was a bit odd in that it had the standard wood grain on the dash, windshield trim and front door window trim but the window trim in the rear was all blue with no trace of it ever having been wood grained. The seats and rear armrests were also blue in a heavy broadcloth.

Coincidentally, I came across this photo of it again yesterday (I may have posted it before) the one and only time I had to use tire chains (which I still have). The tiny bit of primer on the front fender was due to a collision between it and my 1939 Six when the ‘40 slipped sideways in the snow in the driveway which was downhill from where it is in the photo, hitting the ‘39’s rear fender but doing no damage to it. I had just sold the ‘39 but it had not yet been picked up.

I can’t speak personally for any of these sources but if it were me, I would be inclined to go with the ones that have the factory specifications. That said, in discussions with one of the companies for rear springs for my 1965 Cadillac, they said that they are made to factory specs and they had replacements for my car but they did not differentiate between self-leveling and standard when I know for a fact that they are supposed to be rated differently (the leveling system’s were softer).

This was probably asked already but have you checked the rubber hose to the pump? Even if they look good on the outside, sometimes they collapse internally causing fuel starvation.

When I started finally working on my 1956 Clipper Custom I discovered it had an aftermarket fuel filter with a built in adjustable regulator and also my 1954 Patrician had a regulator in place of the fuel filter which I kept set at around 2.5 lbs. Both of my blogs show them.

Have you tried taking yours to Napa to match up? I understand that the main difference between condensers was the mounting and the length/type of wire but that the condenser itself was the same.

It was the mounting in the one photo that showed it attached to the door’s sheet metal that was wrong but the mirror itself looked proper.

One of the heads I have has something like 288STD 327.

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The heads were physically interchangeable but with slightly different compression ratios so once you determine which engine you have, you can then find which engine is needed. I do have a 1951 300 core at my Oregon shop should you need it.

Mirrors were always added later by the dealer or owner as the factory never installed them even though they were in the accessory catalog. The clip-ones were always aftermarket.