Im getting ready to replace the guides given these two are loose and allowed oil to enter the cylinders (MB's look so bad blowing blue smoke).

The consumption issue began around 2 1/2 years after I bought the car, so im going with wear. If they were always loose, say from a shoddy head job, the car would have always smoked.

As far as having the heads redone, Im thinking they are original. I say this because the car was a weekend car for an older couple (they were the 1st owners, im the 2nd) and had relatively low wear on the car when I purchased it. I put it into service as a daily driver after 27 years. I can not say with 100% certainty that they are original, just a hunch.

I got those numbers in my origional post after taking a caliper to them and I was surprised at the outcome, I fully expected the ID of the intake ports on the head to be 14.10 mm or so and the guides to be 14.00 mm (the wear occouring on the softer metal), this has me a little perplexed.

__________________
". . .back before accountants designed cars"

-Current Stable-
'78 MB 450SL-C 107.024.12.020783 #3840 <Kayleen>
'85 FORD F250 6.9L Diesel <Allison>
'98 Lexus ES300 <Rachel>
Long Gone...
'74 Chevy G10...........................'99 GMC Yukon 4X4
'83 Chevy Suburban 6.2 diesel .....'99 SAAB 9-5
'90 Mitsubishi Eclipse GS............. '01 Chevy Tahoe
'98 Nissan Altima .......................'02 MB ML320
'88 Chevy Suburban V2500 4X4 6.2 diesel