gazness

hi guys my names gareth and i just swapped my ute for a gp turbo can't find alot of info about these 3ete motors mines running really rough got a quote to fix it not to bad but i just don't know how much faith to put in these motors? would it be better to swap motor to a 4age or something about more sourced any info or point in the right direction will be appreciated. This is my forth corolla 2 sprinters and an ae82 twin cam thanks guys

had it looked at just timing chain no biggie