RockyPat
Well-Known Member
Hello everyone,
I have a 1969 383 R stamped non-HP motor.
I got it for free, as it had been sitting outside for a while. Water got in it, and it’s stuck.
I used a wire wheel to get rid of the rust and grime to see the condition of the cylinder walls.
To my surprise I noticed that the pistons are flat tops with “40” stamped into them. I don’t think these are stock pistons. Someone must have rebuilt this engine at some point.
I assume that this means the engine has been bored 40 over. Am I correct? I do not have a micrometer, so I haven’t measured the bore yet.
I was thinking this engine still had its stock bore, and that I would be able to bore it out to clean up the cylinders.
2 cylinders are very bad and the other 6 are not bad.
With the block possibly being 40 over and the condition of the 2 cylinders being this poor, do you guys think this engine could be bored 60 over and saved?
I could sleeve the 2 bad cylinders, but I don’t know if that makes sense when I can pick up another block for a few hundred dollars.
Let me know what you guys think!
Thanks!
I have a 1969 383 R stamped non-HP motor.
I got it for free, as it had been sitting outside for a while. Water got in it, and it’s stuck.
I used a wire wheel to get rid of the rust and grime to see the condition of the cylinder walls.
To my surprise I noticed that the pistons are flat tops with “40” stamped into them. I don’t think these are stock pistons. Someone must have rebuilt this engine at some point.
I assume that this means the engine has been bored 40 over. Am I correct? I do not have a micrometer, so I haven’t measured the bore yet.
I was thinking this engine still had its stock bore, and that I would be able to bore it out to clean up the cylinders.
2 cylinders are very bad and the other 6 are not bad.
With the block possibly being 40 over and the condition of the 2 cylinders being this poor, do you guys think this engine could be bored 60 over and saved?
I could sleeve the 2 bad cylinders, but I don’t know if that makes sense when I can pick up another block for a few hundred dollars.
Let me know what you guys think!
Thanks!