3/8 for a normally sprung rig. is not even close to enough.
if you leave power close to what you have now you should be ok for cooling though...
in your case, with the wicked suspension and tied up chassis i have to take back my original assesment because you may just be ok. i would slightly tension some chains pulling the block biased to the rear though.
looking at your current avatar made me think...hell theres no way for the frame to twist the motor and radiator together...i simply forgot how well you had this thing working previously...
my ttb setup needed an inch and a half...my current setup with leaves does as well...i rely on frame twist to some degree...on road handling is solid though. my experience with airshocks left me with the impression they would be off the table for my needs. i still use mine as a truck 95 percent of the time...when its not trail riding or being a snowmobile or ice shanty...
regardless countering the pulley bolts is worth the time if you get a few minutes...but i really dont think permanant damage will occur from the perspective of that pic when they eventually self clearance a bit. grind itself cozy is all...
and they will. unless you chain em back smartly.
my preferred cooling setup is much quieter and runs the fan less and nets more room depending on how you mount the winch. run what ya got and go from there is what i would do as well. if you do run into cooling issues i do have some shit you can try out....so you dont have to waste any money
