[Steeveedee]

I wouldn't bother with new lifters. I don't think that it is actually valve train related. They may last until summer, but the difference in the grind angle on the old cam and new lifters after this much wear is pretty sure to wear them down, possibly before then. Which Lucas oil product did you use? If it's thin and some kind of cleaner, it'll defeat the purpose of the STP. Summer ain't far off. Maybe just nurse it along?