If you go with the plate conversion with the 216 waterpump then you need to use the 216 damper pulley. The later 235 damper is larger in diameter and will spin the fan faster... too fast for the 216 fan. It will sooner or later come apart... right into the radiator. You would need an aftermarket fan of sorts that will hold up. Or just use the 216 damper. That's what I did. 10,000 miles and no problems.

I drilled holes in the front mount plate and installed carriage bolts from the bottom, using locknuts.
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~~ Jethro
1954 3100
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1951 3100 (gone) / 1956 4400 (still in the neighborhood) / 1957 6400 with dump body (retired) / 1959 3100 panel (in the woods junked) / 1978 Custom Deluxe K10 / 1993 S-10 4.3 / 2004 Chevy Crew Cab / 1945 John Deere H / 1952 John Deere B / 1966 John Deere 2510 / 1967 John Deere 1020