I've done some reading and it sounds fairly difficult to put a tachometer on a TVT691. Briggs and Stratton coils are easy to wire a tach to so my question is, can I use the Briggs Model 28 coils with my stock flywheel? E.C. has the wiring harness but it says in the description that it is for use with their flywheel and the Model 28 coils. Thanks Mike