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Newb
#11
Welcome over from the dark side, lol.
This link is to the best decoding site for Ford numbers I have ever seen. http://mustangtek.com/FordDecode.html
You need to look at your head casting numbers and block. All of the cleveland blocks 2 and 4 bolt have same number so you have to open it up to see if 4 bolt.
Ford quit calling the 351 4-V 4 bolt main cleveland a CJ mid year of 72. They also put smaller valves in the 73 and dished pistons. So probably a rough ranking of the 351 C would be as follows.
Boss 351 all the good things.
351 HO most of what the boss had few things dropped.
351 4-V Cobra Jet. Lots different from HO still a great engine.
351 4-V lots of drops in performance, due to cam timing heads and pistons. 73 had more pollution controls.
They are casting new 351 blocks in both Iron and aluminum.
351 H code 2-V has same block as 4 bolt can be machined to use 4 bolt caps.
There are Australian heads from their 302 that have the runner size of the 2-V but valves size of 4-V. Ford and some of the NASCAR guys made some different heads for the 351 but pretty scarce now.


When a man is in the woods and talks and no women are there is he still wrong??
Tongue
David
  Reply
#12
Welcome from northern California.

mike

[Image: 1_11_11_13_11_50_27.png]
  Reply
#13
Welcome from Illinois!
  Reply
#14
(12-07-2018, 02:08 PM)Carolina_Mountain_Mustangs Wrote: Welcome over from the dark side, lol.
This link is to the best decoding site for Ford numbers I have ever seen. http://mustangtek.com/FordDecode.html
You need to look at your head casting numbers and block. All of the cleveland blocks 2 and 4 bolt have same number so you have to open it up to see if 4 bolt.
Ford quit calling the 351 4-V 4 bolt main cleveland a CJ mid year of 72. They also put smaller valves in the 73 and dished pistons. So probably a rough ranking of the 351 C would be as follows.
Boss 351 all the good things.
351 HO most of what the boss had few things dropped.
351 4-V Cobra Jet. Lots different from HO still a great engine.
351 4-V lots of drops in performance, due to cam timing heads and pistons. 73 had more pollution controls.
They are casting new 351 blocks in both Iron and aluminum.
351 H code 2-V has same block as 4 bolt can be machined to use 4 bolt caps.
There are Australian heads from their 302 that have the runner size of the 2-V but valves size of 4-V. Ford and some of the NASCAR guys made some different heads for the 351 but pretty scarce now.

Thanks David. Great info.
JB
  Reply
#15
welcome2   from Belgium
  Reply
#16
Welcome from the great Land of Texas....
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