4 valves, whats the gain? by: steve - May 31, 2015 19:38:33 GMT -5 Back to Home Reply Quote Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by steve on May 31, 2015 19:38:33 GMT -5 I've heard you need to add a link to the timing chain. Aren't those heads about 1/2" longer? My timing chain won't accept a thicker gasket, much less 5 or 6 mm.
