Daniel from essex m271 engine ingo needed.

[blythey14]

can anyone tell me the diffrence between the cgi turbo engine and the compressor engine , what year did they change psitons to create the evo engine , need to build a engine as prices are crazy .
can i use any m271 block and head or would i need to replace pistons and con rods .

any info would be a great help

Thanks