That is correct. I believe the 145 HP O-300 was replaced by the
Lycoming 150HP O-320 around '68. We had an O-300 in ours and decided
to replace it with a O-360 (180 HP). Glad we did. Continental doesn't
make the O-300 any more, and the extra 35 HP is great. It's a little
expensive (somewhere around $32K) but you get a factory new engine. I
love having the extra power and getting to keep the manual 40 degree
flaps. (Ours is a '64 E model.)

JimT96309 wrote:
How do you get 15 fewer horses? You may actually get a few more with
mogas.


It is my understanding that the 0-300 is only rated at 145 hp.


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