Headers for 1967 Dodge Dart

The summit headers work fine. are they easy to get in? No. Are any headers easy to get in, no. listening to people argue back and forth is just going to make it more confusing. But just don't let people scare you from working on your hobby. Or cyber spend your money on stuff. The other stuff like Doug's headers or ttis are not going to get you any more bang for your buck. A little easier to put on sure.
At least for the summit headers you do NOT need a 90° angle adapter for your oil filter. All you need to do is go to Walmart and buy a mo-090 Mopar oil filter with the Mopar m on the side of it. And if you have to buy one at a parts store make them match the price of Walmart.
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At some point the question is what's in your wallet?