dissided to have my car welded rarther than scrap it, because somebody made me a offer i could't refuse. £230= 2 full seals, and 2 archs. the only trouble is i have to get them filled and sprayed, any advise on a diy job?. the archs have been - - - welded on. also on a different note, is it worth haveing a powerboost valve if a car is super chiped?.