I am building a stock chasis 70 Challenger with around 600hp. My question is at what power level should I be thinking about a front motor plate? I was going to go with solid motor mounts only. Also wondering if anyone can tell me if I use the Andy F motor plate sold at Mancini, will the alternator still mount in the stock location? Are there any other issues to think about when adding the plate? Thanks for any help or suggestions.