Will a flex plate like this hold up to 500hp? Picture is for reference only. I had a 408 roller engine built from a 5.9 magnum and builder said he was including a flex plate that was balanced with the rotating assembly (all forged internally balanced) I hate to question a shop but it looks kinda flimsy to me. I assume this is what he normally uses for this combo and hasn't had any failures..I am a four speed guy and rarely mess with autos. Am I worrying too much?