14 lb procharger on a rebuilt block?

[NO SLO PK]

If you know your engine was well maintained, e.g., frequent oil changes, not seen detonation, not overheated, not severely raced, then you may be okay. THAT'S A BIG MAYBE. There are some things you should consider first:

1) How much oil does your motor currently consume? A quart every 2,500, or a quart every 500 miles?

2) If there isn't much oil consumption, then you may want to do a leakdown test to confirm the rings are still sealing.

3) Is the oil pressure still good?

5) 14 psi is a lot for old rings to handle.

I've never seen or heard of a high mile motor blowing up just because someone added a supercharger to it. From what I've seen ring seals get worse, to the point where blowby is excessive and there is significant power loss combined with excessive oil consumption. Assuming this happens to you, then you would have had to rebuild your motor anyway...

My LX was supercharged since 1992...finally at 130k miles, I changed the short block...didn't have to, but just figured it was time.