While sitting in my garage and drinking my favorite beverage I began looking at the intake manifolds to my 1975 850 T. I started to notice the difference between the two of them. One spigot for the carb was at a different angle then the other and the vacuum access ports are also different. Are there separate intake manifolds for left and right or do I have manifolds from two different years on my T? Are the angels different to keep the rear of the carbs from contacting each other and to allow room for some form of air filter ? An inquiring mind would like to know.