I'm in the process of replacing a broken bolt on a head of a y block 292 and while I'm there I want to replace all head bolts to eliminate future problems. Does anyone know were can I buy new head bolts? I also called barn hill bolt and told me they have the right grade but on 4.0",4.5",2.5". Could I get away with adding washers to match acquired length? The original bolts are 4.32", 4.06" and 2.13" long. Would I have enough clearance?