I'm going to be driving the car so i don't want to go Bias. .....
There are times that I will want the original look with the hubcaps. I think for now I'm leaning towards Hankook BSW tires. After looking at the window sticker and seeing that BSW is what was on it when new.
IMHO don't do BSW, WSW to the inside looks goofy and BSW won't be flattering to the wheelcovers or the car. That is what car guys will notice, we won't be seeing the window sticker to know what's correct. Dad bought a 77 Dodge Aspen SE 4dr, ordered it with BSW and full wheelcovers and it looked *terrible* (Dad didn't know how to keep whitewalls clean so didn't want them). With all the SE trim and pinstripe it looked like wearing a shirt and tie but not wearing a belt.
Or.....
You can buy a reasonably priced commonly available tire in the size of your choice and buy a $35 speedometer gear.
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Remember this is a 65, so speedo gears for 65-older are unobtanium (last I knew anyway). And I spoke with the owner of 'famous' A&A Transmission a month ago and he is contemplating (but struggling) to find a cost-effective way to re-pop these gears.
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I run some older Kumho 215/75-14 on my 300L and they are a decent tire and the correct diameter. Do I wish they were wider? Sure! But they work just fine for a cruiser. Haven't put many miles on them in the last 7 years, but they hold their air very well, so that's the most important thing right now.
From what I've read, UV exposure and exposure to other weather conditions probably plays the largest role in tire degradation. I have 2 cars sitting on 5-9 year old tires and they have no visible cracking or degradation. 1 sits indoors 100%, the other sat outside most of the time but in a shaded area.
IMHO the shelf life of tires is a ripple in a pond, the media and tire professionals are just parroting the same rhetoric.