well if it needs a crank or fresh turn and you need pistons any ways you could just build a 489 or 496 use a cast steel crank. speed pro makes hpyer pistons or KB s with a stock 6.135 rod i built many .fun engine to build over all cost over a 454 would be less then $450. over the cost of a 454 if your buying new parts and getting it balanced any ways.i have two short blocks going together now