Yep, as I said: LA piston. I lined a used '87 318 D250 piston up with a used '92 5.2L Magnum D150 piston on a common pin. Identical compression height. I even checked them against a NOS MoPar Performance "9.0:1" piston (a cheap Silvolite/Badger/etc. cast piston with the top milled LESS, valve reliefs appear deeper than a '67-style 4-eyebrow but only due to less top milling) and they have less CD by a good bit.
