2008 Ford F250

I have a 2008 F250 for sale. Has head gasket issue. Runs and drives fine but will push boost back through the coolant system and out the reservoir if you get on it hard. Has been like this for a couple years. Front end has new tie rod ends and wheel bearings. Transmission fluid was changed and serviced 5000 miles ago. Fully deleted and tuned with H and S mini max with unlock codes. Has been tuned since 120000 miles 4 wheel drive works but auto hubs dont work so you have to get out and lock the hubs in. Ac also does not work. Text preferred or leave a voice mail.