Magnum engineering do a kit v8 into a sierra,bowth ford v8 and rover v8
but the kits arnt that good imo,ur better of getting the parts u need made
up as u need them, to what spec u want them. Iv got a 4 l rover/tvr in my
saph and its great fun and would highly reccommend doing a conversion
but like anything to do properly its not a cheap conversion