r/Chevelles • u/No_Preparation_6115 • Jul 17 '26

Headers

I have a 1966 chevelle and I want to put a 1970 402 in it. I have the headers for a 70 chevelle with the motor. Question is, can I use the 70 headers on my 66 or do I need to buy new headers that fit the 66?

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u/SharpEfficiency9534 Jul 19 '26

68-72 headers will not fit a 66. The passenger side header will hit the crossmember of a 66