79-80 4.9 turbo

hi im new around here and i have a couple questions. first im looking at a 4.9 turbo pace car for sale and i was hearing from different people that these turbo cars are a p.o.s. is this ture since their not intercooled or liquid cooled? second do they make intercooler kits for the 4.9 tubos if not can you do it yourself and what will you need or half to do to do this?

thanks for your help mark