Sure many know if this but thought I’d post it up, be a good sticker thread. I can’t download it so you’ll need to join the Alpine forum to see it and download. This is the mod I’m doing this Winter in a spare head I’m waiting on arriving. It’s a very well know change and well thought of in the industry. Up to 15hp on the 1725cc alloy head though I’d be surprised at that much...
http://sunbeamalpine.org/wp-content/uploads/2010/08/Vizard-Mod.pdf
http://sunbeamalpine.org/wp-content/uploads/2010/08/Vizard-Mod.pdf