100cs 1981. Valve settings?
Doing my 30k all fluid service and preparing to set intake & exhaust clearance. I've got a new Clymer (10&20mm) and a real old Clymer (15&20mm) along with the original booklet that indicates after break in (10 & 15mm). I'm thinking of following the old booklet with intake of 10 and exhaust of 15mm. Why all the in consistency from one edition of the same book and then the factory booklet? Is there any advantages to one of these setting over the other?