I have a GM Marine Power 7.4/454HO motor and was needing some info on the block and heads.
2 bolt or 4
GM Block part # 12568777
Head casting #12562934
I think the heads are open chamber 502 marine, would like to know valve size, cc of heads(118cc).
i could find info on the block,
The casting number is usually easier to find information with, as opposed to the part number,, not sure if you missed a digit or what, wouldn't come up for me. A 2001 block should end up being a 4 bolt Gen 6 block.
the casting number is close but not showing in the lists i looked at, i am leaning the same, 01 Gen 6
mine was a 97 7.4 in my baja. 4 bolt main, hyd roller. I think 330hp- gen 6 block
Thanks for the info!
Please enter the name by which you would like to log-in and be known on this site.
Please enter a password for your user account. Note that passwords are case-sensitive.
Please enter a valid email address for yourself.
Please select your insurance company (Optional)
View Tag Cloud