Yes its possible , you need to replace the rods and pistons, a decent supercharged setup on a 16v with give you over 230hp very easily. A turbo conversion will get you alot more if done properly Your base engine (AFH) is spot on , I really dont understand why people use the silly VW alloy block and later head to use for forced induction. The design is rubbish and the heads are even worse and need throwing in the bin. Budget for an aftermarket ecu , because you'll need it.