I just acquired my winter project. I picked up a C9DE-6090M large log head. It’s not the desired mid/late 70’s head but it’s much bigger than the small log head that came on my 66 Mustang Engine.
I did some preliminary review but I have to completely strip it, have it magnafluxed and cleaned up. I’ll give it a valve job and make sure it has hardened seats and replace the guides. I’m going to do as much porting as I can and clean up the castings to make it flow as best as possible. I’ll mill it for a direct 2V plate for my 38/38 too.
So far it looks like it has 1.75” intakes and 1.38” exhausts. The log intake is 1.75” too. I just measured with a vernier caliper. I’ll CC the chambers and see what I get. I think it should have 62cc chambers so I’ll need to mill it appropriately to get the compression up.
I’ll also need to look at what I can get for rockers. I’d really like to go with 1:6 ratio rockers to take full advantage of the camshaft I’m running but in any case, I will need adjustable rockers and pushrods.
Aside from some rust in the log and a bunch of dust and debris on the head, it’s in pretty good shape. The chambers are oily and greasy, the rocker assembly was removed so the valves were all closed and none of the exhaust bolt holes are cracked or broken.
Fun times!!
I did some preliminary review but I have to completely strip it, have it magnafluxed and cleaned up. I’ll give it a valve job and make sure it has hardened seats and replace the guides. I’m going to do as much porting as I can and clean up the castings to make it flow as best as possible. I’ll mill it for a direct 2V plate for my 38/38 too.
So far it looks like it has 1.75” intakes and 1.38” exhausts. The log intake is 1.75” too. I just measured with a vernier caliper. I’ll CC the chambers and see what I get. I think it should have 62cc chambers so I’ll need to mill it appropriately to get the compression up.
I’ll also need to look at what I can get for rockers. I’d really like to go with 1:6 ratio rockers to take full advantage of the camshaft I’m running but in any case, I will need adjustable rockers and pushrods.
Aside from some rust in the log and a bunch of dust and debris on the head, it’s in pretty good shape. The chambers are oily and greasy, the rocker assembly was removed so the valves were all closed and none of the exhaust bolt holes are cracked or broken.
Fun times!!
. It will be interesting to follow 
