318 Flex-A-Lite or Clutch setup

What fan are you running ?

17'' CLUTCH SET UP --------HAVE AN 18'' ON THE BENCH , BUT A FULL MECH. HAS SHOWN TO BE ABOUT 6-8 DEGREES BETTER ON MY HEAP, BUT SUPPOSSED TO COST ABOUT 20 H.P.IMG_0475 (1).JPG
-------------------------------------------------------------17'' ^^^^^^