So I was doing some research and found that Ford made a 221 v8, which is the precursor to the 260 and then the 289. Should I be right to assume that bolt on modifications that fit on the 289 will also bolt to the 260 and 221? Anyone know if an AOD will bolt to all three of these engines? Thanks!

 

Some, not all, of the modifications of the later engines might apply. There was something odd about the water passages in the intake manifold.

As for the AOD, not a chance. The 221 was the wrong bellhousing pattern. There is a 5-bolt bellhousing adapter for the T5.

 

It is a total looser as far as ANY performance value. It has little bitty cylinders only big enough to fit little bitty valves.

I would imagine that it would be a POS as far as far as economy goes because it would have to work so hard wheezing through those anemic heads....

the 289/302 engine is just so superior to a 221/260 that a person would be nuts to spend the big $$$ it would cost to even rebuild this oddball engine, (even stock).

>>> And as stated, it is a 5 bolt bell, it will only fit a few early trannys.

 

221, cute. And well put JMD. My V6 has more cubes. How big is the bore on that little tike?

 

It's a 3.5 bore

 

not too bad.

 

I did some work last year on a "64" Mustang that had somehow acquired a 221 to replace the original 260. I gotta tell you, it ran very well after the tune-up, certainly not a disappointment. You'd never be able to tell from the driver seat that it was an undersize engine.

 

slap some turbos on it and wind it to 8000 rpm and see what it does then.. Remember this is coming from a guy who rarely builds engines under 400ci...