64.5 and 65 motor mount question

trainfor302 · March 2, 2011 at 6:22 PM

What motor mount did the 64.5 289K use? The books show no difference between 64.5 and 65, but I know the 5 bolt(64.5) block mounting bosses are on six inch centers and the six bolt block{65) bosses are on seven inch centers. Is just the top piece of the mount different? Thanks, Tom

C6ZZKGT · March 3, 2011 at 12:06 AM Official Post

The 64 1/2 five bolt block has the same bolt span as the six bolt block. The shorter bolt span was before 3/3/1964 which predates Hipo Mustangs.

-Fred-

trainfor302 · March 5, 2011 at 11:41 AM

When I bought my 64.5 car 28 years ago, it had modified mounts in it. Those mounts and engine are long gone, but now I know what should have been in the car. Thanks, Fred, for the information. Tom

FXguy · March 12, 2011 at 10:07 AM

Quote from C6ZZKGT

The 64 1/2 five bolt block has the same bolt span as the six bolt block. The shorter bolt span was before 3/3/1964 which predates Hipo Mustangs.

-Fred-

I have a C3AE-6015-N block cast first week in Feb 1963 with the 7" spacing. According to Bob Mannel's book, this change occurred with this block casting.

-Scott

bobmannel · March 18, 2011 at 8:19 PM

All 289's used the 7" spread. You only have to worry about the 6" or 7" spreads on the 221 and 260 V8s.

trainfor302 · March 18, 2011 at 10:57 PM

When I bought my car in 1983, it must have had early 260 mounts with extensions added to them. I wrongly assumed that they were original. I now have all the parts to intall the 289 Hipo mounts. Thanks for your help. Tom

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