The engine and transmission in my 66 is from a 65. as a result I believe I have the incorrect vacuum line and cooling lines. For the vacuum line should I have the two rubber end version with the shorter piece attached to the manifold? For the cooling lines It looks as though there were rubber lines connected to the radiator for 65 and full solid lines for 66? Did the design of the hard line change in 66 giving them the ability to eliminate the rubber connection point?