why not put a 518 in it? I run 3:91 with a 440 in my cuda with 26" tall tire and 60 mph is about all I care to cruise the highway at. I'm thinking about a 518 swap over the winter.
I'd like to but I doubt it would be durable enough for a 500" MW engine. I don't really ever plan on racing this car but if I ever change my mind I don't want to have to worry about the transmission so much.
By the way guys, my cam is the 557 MP purpleshaft, for those of you that have asked.