Anyone have the specs on the fan shroud bolts that go into the radiator? Swapped-in rad has plastic retainers over the bolt holes, and the bolts from the last radiator (stock bolts I think; pretty short, and shorter still with lock washers and non-removable washers) don't reach the threaded holes after passing through the retainers. Hoping to find longer replacements locally, tomorrow. Thanks for any help!