Jan 23, 2020 · Intake Manifold Leaks - Gasket Leaks Spell Trouble For Your Engine The most common leaks found in an engine are intake manifold leaks. Intake manifold gaskets can be made of paper, rubber, metal, and sometimes a combination of the three. Intake manifold gaskets are responsible for sealing the intake manifold against the cylinder head(s). These big Fords were offered in seven different engine choices, 240, 302, 351, 390, 400, and 429. The 429 was available in both two and four venturi carburetor options. The 429-4V boasted 360 horsepower for the ultimate in power. The only choice of transmission for 1971 was the Select Shift Cruise-O-Matic three speed automatic transmission.
I got a 69 4V intake that i'm putting on my 82 windsor, and the intake has 4 extra holes in, all i did was tapped the holes and put pipe plugs in them. THe extra holes in the heads shouldn't make any diference, a lot of the aftermarket manifolds don't have the extra four holes and there designed to work with the new or old style heads.