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1971 351c m-code engine
What was the actual hp when new... many engines was down rated in that era!
I'm not aware of anyone having done a dyno test on a completely bone stock M-code build. I'd like to see how it compares to Ford's numbers.

I can't vouch for accuracy but, this may answer your question.   http://grantorinosport.org/bubbaf250/specs/specs02.html  Chuck
(06-23-2018, 12:29 PM)c9zx Wrote: I can't vouch for accuracy but, this may answer your question.   http://grantorinosport.org/bubbaf250/specs/specs02.html  Chuck

 Chuck, not to be too critical, but that is referring to the "M"  351/400 engine not the 351 M code of 71. How confusing!!!
It would be interesting to know exactly what the M code engine actually produced for HP. The factory rated  M codes at 285 (I think without double checking)
You are right. I miss read the question. At least we know why we don't want a 351M. Sorry for the confusion. Chuck
I few years ago. One of the car mags. Tested a bunch of stock rebuilt muscle car engines. The 70 351c made 383HP if I remember correctly. I do remember rubbing that in my Chevy buddies face.
This link seems to have reliable data from 1970. Chuck  https://www.tapatalk.com/groups/clevelan...9ca6f0cd74
Close to stock

“If you can't explain it simply, you don't understand it well enough.”
--Albert Einstein
Yup, I stand corrected. Quick get on coming up with that article!
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