Mk1 golfgti

Starting engine conversion brought donor car 2003 VW VOLKSWAGEN GOLF GTI TURBO  with upgrades planning to drop all this in mk1 with loom gearbox , brakes ,disc ,shocks 
3" DECAT
FRONT MOUNT INCOOLER
HARD PIPE INDUCTION
FORGE WAISTGATE
FORGE MAP SENSOR
STAGE 2 REVO REMAP (150bhp 201bhp 257bhp)
UPRATED COILS BOOST GUAGE ENGINE SERVICE
NEW DISCS AND PADS …upgrading turbo to Garrett gt28 350+ bhp,,stage to clutch …….My question is will I need forged pistons and rods and valve 

I think any questions relating to the engine itself, is best asked over on club gti where its used much more than in mk1,s