flat top pistons are available from sealed power the specs match the dish pistons for the 200 engine. the # 's are 489p in standard .020,.030,.040 & .060 these pistons are for the 1984 tempo engine hsc. the wb site for ordering them is: http://www.pickproparts.com/PartsList.a ... oryID=5620 . according from sealed power the weight is 585 grams for the flat tops, the stock dished piston is 635 grams. so an engine balance is necessary. hope this helps a lot of folks looking for more compression. good luck on your engine. william 
