We use the Spall that Don is talking about in all our V-10's. No problems. I have to block off the
oil cooler as the
oil has never gone over 140 even on the track. Our exhaust temps at the header flange is (normally) 1125/50, rarely engine temp ever goes over 190, even on hot days and at the track.
Spall will do the job fellas. (Stay away from those pusher/puller fan combo's!)
DV