383 for a weekend crusier will do fine with 3:91 or even 4:10's. You can still go 70 on the highway. Like everything else you can't have the cake and eat it too. The car would be a lot of fun with 4:57's but forget the highway. Lose the torker it sucks for a street car. I'd advance the cam 4 degree's if it's just set dot to dot. And get your timing up.