Room for a Clutch-Fan in a '65?

man, that's pretty tight... if you have the room i personally don't see any reason not to.

i think the hayden 2947 is the shortest "lo profile" one available that will support the weight of a steel fan without shortening the lifespan.

just remember that you'll need 3/4" clearance to the rad.

anyway, 15hp is the generally accepted hp loss on a solid fan, or thereabouts.