Hello there on sunday my mate seized his 1990 mk4 escort van solid we have been looking for a replacement engine and have only found a like for like low mileage out of a mk5 van only problem is the key is chipped so engine imobilised because its a scrapped van there is no keys I recently bypassed a rover imobiliser with great difficulty and I understand the imobiliser on the van isolates the fuel pump ecu or starter so if I was to fit it with a non imobilised fuel pump and wire a simple push button switch to the starter will it crank and fire ? Or will I be getting conned out of £175 ?