IMO much better to get a recon box with the Sonnax valve block (and other upgrades) than throw a box in with unknown history.
Better still if it's low'ish mileage get your own recon'd then you know you're not getting a box with 250k miles on it.
Also no point doing GB and leaving original TC to contaminate the new GB if it lets go.
Better still if it's low'ish mileage get your own recon'd then you know you're not getting a box with 250k miles on it.
Also no point doing GB and leaving original TC to contaminate the new GB if it lets go.