7m-gte internals

ive recently bought myself 1988 mkIII turbo A and was told that if i wanted to up the boost to 14psi (1 bar) i would need to have forged internals and a copper head gasket. Is this true or are my mates full of it?? any help would be great

you would just need a new head gasket, the supra already comes with good internals but the head gasket is crap on turbos. Ive heard that you could just torque the HG down to 72 lbs of torque instead of a new one though.

bigger exaust would help and so would a waste gate and intercooler set up. it wouldnt be fun to just straight out blow something right when you get it.... speaking from experience.