Trying to get the 70 model six cylinder on the road. I think it is the 250 in line six,got the carb to not leak, and i need to road test. One problem ,an air filter system. Went to o'reileys and found a 4-7- 2- 5/16 throat ,k-n drop in housing .Its to tall,only have three inchs total clearance under hood to carb. What would you people recomend? I have thought about a cold air tube system.