for a start can it be done, i have benn offered a st170 bottem end by my local engineerin company who do my rebuilds, was told this would be good to use as they come standard with forged pistons, would also like to no what is the correct compression e.t.c as have been told many different compresssion and ways of lowering it, and also is there anything different from the 1.8 conversion, i want to be able to run at least 18-21psi, i currently av a 1.8 zvh which i built but used a de-comp plate so dont run any more than 12-14 psi

Many thanks