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A worn bore and a backyard hone'n're-ring job, I would be using plain old cast rings, not moly. Moly coated rings seal better and break in quicker but they are not as forgiving on a worn bore as cast rings. Hastings cast rings are a good choice for these types of builds IMO.
 100%
most 85 318 with roller cam #302 heads had the moly rings stock.
they do well on bore wear and tappor,MY 300,00 mile 88 is still in specs for a rering with used pistons.
i will slap a set of stock cast rings in wafter a dingle ball hone job to clean them up some.
if its in specs its in specs for a re-ring 
i may not get another 300,00 but another 150,000 will work for the price.
No roller cam in this 85 block
'85 up M body 2bbls are roller cam. 4bbl flat tappet, trucks flat tappet (but roller block) from '85-88
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