Engine ID & Cam change
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New User
Joined: Jan 2000
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Engine ID & Cam change
I am trying to verify the engine size in my '68 F-100. It had a 360 from the factory, but the person I bought it from said he replaced that with a rebuilt 390. I just don't know if it is a 360 bored up, or a true 390. I want to make a cam change, and am told the crank in the 360 was different from the 390. The wrong cam could spell disaster.
Can anyone help me decode the casting numbers to ID the engine? Here's what I found...
On top of the blockin front of intake: 8F 17
Located just in front of above code: C8 TE 9425A
L&R sides on heads: C8 AE-H
ANY and all help will be much appreciated, Thanks!
Can anyone help me decode the casting numbers to ID the engine? Here's what I found...
On top of the blockin front of intake: 8F 17
Located just in front of above code: C8 TE 9425A
L&R sides on heads: C8 AE-H
ANY and all help will be much appreciated, Thanks!
Senior User
Joined: Jan 2000
Posts: 166
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Engine ID & Cam change
The only code I could decipher was the one given for the cylinder heads. The C8AE was standard on 360, 390 and 428 engines in 1968. As far as I know, you will not be able to distinguish between a 360 and 390 externally. The only real difference is in the crank, rods, and pistons. The 360 has a 3.50 inch stroke while the 390 has a 3.784 inch stroke. Thus if you want to know what you have you must measure the stroke or tear the engine down to the crank. As for the crank castings the 360's numbers are 2T and 2TA and the 390's would most likely be 2U if it is a '68 and out of a truck; otherwise it could have a different casting numbers.
If you are merely installing a camshaft and the motor is basically stock otherwise, it will not make a huge difference if it is a 360 or a 390. It seems that a lot of guys on this site agree that a Comp Cam 268H is a good choice for these engines. I'm going to install one during my upcoming rebuild on my 360.
Good Luck.
Jim
If you are merely installing a camshaft and the motor is basically stock otherwise, it will not make a huge difference if it is a 360 or a 390. It seems that a lot of guys on this site agree that a Comp Cam 268H is a good choice for these engines. I'm going to install one during my upcoming rebuild on my 360.
Good Luck.
Jim
