360 magnum to 408

A fully balanced kit from Hughes is $1700

Shipping costs as much as a decent timing set too.
Hughes or IMM would be the place to go.

I personally prefer IMM since Brian will call you on his own accord to keep you updated and informed on everything as well as making sure you thought it all through and have everything you need.

This is not taking anything away from hughes though since my experiences with them have been good too.