Logan, when I say its a 50 mph car, its just that the earlier body seems and likely is a bit heavier than the 51-55. Its a Special, so no overdrive.
Besides, I had (to have) the engine completely rebuilt just after I bought it, and I have always heard that excess heat and revs were the death of these engines, so I'm not chancing it.
This is a true story.....The previous owner drove a nice rust free Saskatchewan-new car back across the bald flat Canadian Prairies without a working speedo--more than likely way over 70 MPH at times--which is why I believe that the engine was so shot when I picked it up and drove it home, all of 530 km (330 miles) on the cusp of winter from Cape Breton to Prince Edward Island. I had driven over the previous week to fully inspect the car for roadworthiness, and everything seemed just fine, no oil smoke or leaks, great pressure, except the compression seemed somewhat low, but evenly low if you get my meaning.
It was a tremendous bonding experience with 'The Green Goddess'. A sudden Atlantic Nor'Easter blew in (think of cold almost-hurricanes for northern folk) after changing direction abruptly out in the Atlantic and it went from pleasant above freezing to ***heavy**** snowfall and winds at a steady 85-95 KPH (50-55 MPH), shortly after I left Sydney, Nova Scotia. There had been no sign of it or reports of impending weather disaster before I got on the bus early that morning for the 7 hour bus trip over to Sydney I was suddenly battling unplowed roads through steep hills on the TransCanada in the hills of Cape Breton, on a car with vacuum wipers. You know the drill for monsoons or snowstorms with vacuum wipers going uphill--full acceleration-back off so the wipers fly-full acceleration for another ten seconds, back-off for 5 seconds so the wipers fly and clears everything off-repeat for 5 hours straight. By the time I got down the highway and through the up and down hills of eastern Nova Scotia, and was climbing through the peak of the Coboquid Pass heading for New Brunswick--there was a full foot to 18 inches of virgin powder on the highways, before drifts. Fortunately, by THAT time the wind had faded to whisper. The Kaiser was >>VERY<< capable through that incredible mess, even the heater worked well. The only drawback was that the car was losing almost a quart of oil per hour, almost entirely through the exhaust (unburnt, no real smoke) The compression was getting so low that I feared if I stopped overnight that I would never get it started again if the engine wasn't warm. I was right, it didn't, and had to be towed next morning INTO the garage down the street where I left it when I got home.
With constant stops every half hour to recheck everything, that trip (ordeal by frost instead of fire) took me 11 hours. I didn't despise the Kaiser at all when I got home--it was a comfortable ride of course--and only regretted I didn't have a radio in the car. And yes, the bias ply tires dug through all that quite nicely. Its on dry flat pavement that you notice their limitations, when compared to radials.