351 Cleveland head ID

my427cobra · #1 (**permalink**) 02-26-2004, 07:28 PM

Hi all. I'm finally getting around to documenting all my engine info. Can anyone tell me where the casting numbers are on the 351c heads? Do I need to pull the valve covers?
Thanks
Greg

Bruce Edwards · #2 (**permalink**) 02-26-2004, 08:16 PM

Yes you need to pull the covers. The numbers are cast in the top of the head.

Woodz428 · #3 (**permalink**) 02-26-2004, 08:59 PM

I think the number is cast on the underside of the intake ports.Since there is little difference between most 2v heads (as well as M heads), if you are trying to determine if it is a 2v or 4v head the early 2v heads and the 4v heads have either a 2 or 4 cast in the upper corner between the intake flange and the valve cover lip.

bittentoo · #4 (**permalink**) 02-27-2004, 05:10 AM

Woodz428 is correct about the casting numbers being underneath the intake ports. You will have to pull the heads to read them

my427cobra · #5 (**permalink**) 02-27-2004, 08:09 AM

Thanks guys. I'll pull a valve cover first and see what I can learn.
Greg

my427cobra · #6 (**permalink**) 02-28-2004, 05:16 PM

Pulled the valve cover - no casting numbers. But the "4" is there at the top corners of the heads and the "4" shows up in pictures of 4v heads in various books. I guess I have 4v heads!!!!
My cast iron intake casting number is "DOAE 9425-L" and is a 4v intake, so I can conclude I have 4v heads.
Thanks all.
Greg