Looks repairable, weld grind and tumble.
Actually, the crack lends "character" to the tie down. But yours is in the realm of "over restored". A tie down was used many times and should look beat up, scratched, dinged and - most important - not look like it just came out of the bead blast cabinet. Get some rust on it as well. If your application is for an actual GT-350, it would be painted black first, then beat up, scratched and dinged.
Jim