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Hello I'm wanting to install tri power on my 65. The intake i have has numbers [a195] [3778818 can someone help id this plenum?
 

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I think it's probably 9778818 not 3778818 and here is your info.
9778818 1965 389 338, 360 Rochester 3x2
9778818 1965 421 356, 376 Rochester 3x2
 

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I actually found it on Pontiac Power DOT net. I also use Year One and Wallace Racing. GREAT resources when searching codes for engines, cylinder heads, intakes, carbs, the works. Usually you can find it at one of the three and I usually compare across sites to make sure everything matches.
 
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