Got a specific brand of additive in mind? I already have Engine Restore in there.

Restore fills gaps and cracks. Slick50 and Duralube should both have PTFE. Normally I'm not a fan of these, but the advice in your case is sound. It may buy you time. Replace one quart with it.

Please do a full oil/filter change at the same time. RESTORE has been known to clog oil filter media.

This soundls like the motor that came in the Blazer I bought :?

John...use the Slick 50..that'* a "50,000 mile' additive where as Duralube is an every oil change additive.

Would it be ok to add with the Engine Restore? My spousal unit will have a shitfit if I spend the money on another oil change the next day.

I can't see how it could hurt, if that'* what you are asking.

The key here is that the oil filter may plug in short order due to the Engine Restore. Just keep a close eye on it, then. :?

...fine, Bill...

What'* the difference between a 93 L27 and any 92-95 L67 rotating assembly?

What would a rebuilder possible charge, given most of the parts minus piston rings and any needed bearings, using generic labor rates. Keep in mind a re-bore may be necessary.

? Huh?

Not you.