hi newbi here<div style="text-align:left;"></div><div style="text-align:left;">I'm just about to start a turbo conversion on my st170</div><div style="text-align:left;"></div><div style="text-align:left;">Can anyone shed any light on which is the best headgasket to use?</div><div style="text-align:left;"></div><div style="text-align:left;">Any advice/info is much appreciated </div>