My understanding is Rockwell made all the u-joints for Merc. Merc part 75832A3. Anyone know the actual part number for that or another quality replacement that is USA cast?

I used to get the solid spicers from my local driveshaft shop, but I don't know the part #

It's been a while, but IIRC the Merc U joint needles are larger than the Spicer joints you can buy with the same external dimensions.

At 228.00 each, they better be GOLD plated! That is the price per one of the OSO Advertisers that keeps popping up while I am typing.

$50 at summit racing...the sierra version..
https://www.summitracing.com/parts/rra-18-2174
if you scroll down under the video to where it says applications and click on the link "check the fit" it will show you your part number (75832A3) in the chart

also you have a listing of other mfg that use the same size...so maybe easier to cross ref from any of those numbers....

Well, even the ones from Merc are stamped Singapore. 95.00 each. Went out to a drive shop and picked up a couple. Have not paid for them yet, he told me to make sure that's the issue and pay later.