My fan on my 56 235 has seen better days. with welds etc, it is not strong enough to not hit the pullys all the time when I am driving. so I am looking for another fan. The problem is I have tried 3 now and the bolt patterns never match. I will continue to look for one, but I wanted to ask are the fan bolt holes different for different 235's? if I supplied the hole measurements would someone know from that what the issue is? I have tried 2 235's and a 194 so far. This 235 is from a ton and a half if that matters.