they are great cars, fantastic engines. if your engine blows then source a FE3 (FE DOHC) it is the best (if not one of the best) mazda 4 cylinder engines ever made and will fit into your 626gt.
i actually have a fully built fe3 swapped 90 626gt. turbonetics turbo, MS tuned, LSD, all the basic's. i believe im the only 626gt that has the fe3 swapped. all the others are mx6/probe swaps i believe.