AM GETTING READY TO INSTALL THE BALANCER.  ANY SUGGESTIONS ON "SHOULD I USE THE EXISTING CRANKSHAFT BOLT OR SHOULD I GET A NEW ONE"?   MY CONCERN IS "CAN THE OLD BOLT TAKE THE 90 LB. TORQUE.?  MY EXPERIENCE WITH MERCEDES BOLTS IS THAT THEY DON'T  RECOMMEND REUSING OLD BOLTS BECAUSE THEY ARE STRESSED AND STRETCHED  AND MAY GIVE WAY.  THANKS