info on a marvelspeed rebuild?
 

how much is it, what reliability and oil mods can they preform. do they offer a warranty, and will they supply a core for an additional cost? this will be for an FD.

The cost all depends on what you need/want. He can perform anything you want done but I would listen to what he suggests too. Don't know about the warranty. He really needs to tear yours down first to see what is salvagable and what is not, you may not need a core.

Just give him a call later in the evening.
972-475-6448