The spin on filter head is around $300. I just converted my 544 from glass bowl type to spin on. I can get you a list of parts if you need. PM me with your email address.
Down here we have a lot of "Southern Belles" with welded arms on the spindles. Are taper-locs worth the hype or would you stick with regular spindles and arms. Thanks for any reviews.
You will probably have to put some spacers between the frame and your mounts. 2350 was designed for the wider frame of the 66 series. It will work. I have one on a hydro 86. Great loader.
Look up Dufour's Tractor Parts in Nashville NC. He Has/had a 312 in a hydro 70 that had just been rebuilt and then the hydro went out and the farmer got disgusted and sold it to him for salvage.
I used to work for Harvester, I used to use my hands, used to make the tractors and combines that ploughed and harvested this great land. Don Henly "A month of Sundays" Album, Building the perfect Beast