Someone asked how you get to 9.2 compression, .030 overbore, magnum heads, and you can use 318 magnum pistons that have a taller compression height in a LA motor they work fine, as 5.2 and LA engines have basically the same rod You would want to re-balance but that's always a good idea when changing pistons anyway. They are not as tall as the KB's but will get you a nice boost in compression for replacement piston prices.