96 millenia s

questions for the regs in here (long time lurker):

i'm about to buy a 96 mazda millenia s

114k original owner--meticulous adherence to service schedule garaged at home and at work zero body defects, interior or exterior owner has all records of everything done largest mechanical fix was a right front cv joint

my only concern is the miller 2.5, cost of parts, and potential for problems later based on what some of you have seen in your shops.

my 91 929 just died, and this millenia looks like a great replacement. should i close this deal?

thanks.