The '65 273 4bbl. intake is 2465726....The '66-7 intake is 2536563 and if the car came with the C.A.P. it was 2536771. I was always curious why the first 340 intake manifold has an earlier casting number (2531915) than the '66 273 intake, Were they playing around with that intake a couple of years before it was introduced? The only intake I remember seeing that started with 27 is the 426 hemi intake. Do you have the full number?
