[cst350]

Just finished getting mine all together. Went on a long stop and start drive on a 100deg day and never got to 200 F. AC isn't charged yet though.

I used 17" Derale reverse fan (#DER-17917 at summit)

used a Hayden reverse clutch from a 1992 K1500 (#2734 from Rock Auto)

I had to drill out the holes in the fan a bit larger for the bolts that connect to the clutch, but not so much to worry.

I trimmed my 1969 AC Fan Shroud about 3/4" and the fan sticks out about 1/2"

Hope this helps