The brass junction or compression fitting is correct for early cars. The early 67's had a 2 piece oil line, which was replaced by the one piece design in june of 67, due to oil leaks. There is a Chevrolet Dealer Service Technical Bullentin on this number : 67-T-31 dated May 19,1967 The part number for the original brass connector is (outside firewall ) 3916737 and (the inside firewall) 3916738. I hope this help answer everyone question. Sincerely Brian K.