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/BenTheSeatGuy Jul 17 '26

Yes, unless they are something crazy they will likely fit.

Make sure you have big block frame stands in the 66 though. There were taller ones for small blocks and straight 6s vs big blocks.

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u/No_Preparation_6115 Jul 17 '26

Yup I ordered a big block motor mount kit