Re: L78 396/375 HP Long Block CKO Stamping
 

Look at Ratbirds CRR stamping. What about this being a 4 bolt main 290 block? hey are said to be 2 bolt only blocks but this is definitely a factory 4 bolt.


Jason


Jason

Re: L78 396/375 HP Long Block CKO Stamping
 

Will this help?
Mark Sheppard

Re: L78 396/375 HP Long Block CKO Stamping
 

Another picture

Re: L78 396/375 HP Long Block CKO Stamping
 

picture 3

Re: L78 396/375 HP Long Block CKO Stamping
 

picture 4

Re: L78 396/375 HP Long Block CKO Stamping
 

picture 5

Re: L78 396/375 HP Long Block CKO Stamping
 

[ QUOTE ]
Will this help?
Mark Sheppard

[/ QUOTE ]

Mark, what is the motor out of? Marine, truck, bus, etc.
Lets clear up this mystery.

Rick H.

Re: L78 396/375 HP Long Block CKO Stamping
 

Shoe leather tastes good https://www.yenko.net/ubbthreads/imag...mlins/grin.gif

Re: L78 396/375 HP Long Block CKO Stamping
 

A buddy in Fresno Ca. had this motor in storage for almost 20 years, I sold it for him about 3 years ago. The motor appeared to have been installed in both a boat and a vehicle at some points in its life. Wish I had more information. I sold it to a guy in Texas.
Mark Sheppard

Re: L78 396/375 HP Long Block CKO Stamping
 

[ QUOTE ]
Look at Ratbirds CRR stamping.



[/ QUOTE ]

Which Ratbird?

Also, I have seen the double stamp/ shadow stamp on other original non decked or restamped blocks.