If I'm cruising along at say 80mph and somebody comes along and wants to run can I drop back in fourth to get some real torgue ? or would that get me killed? in 6th gear it's just a gradual pickup and 5th is a little more kick so I think I would try 4th .but don't want to see a piston jump through the hood either. any advice on getting more top end speed? or what's safe and what ain't.