455

i know i may sound stupid askin this but is a 6.6l a 455 in the trans am like the 76 through 79 models whatever

6.6 is 400

take the cubic inches of displacement and divide it by 61 and that will give you the liters of dislacement. It could range up to 61.5 or as low as 60.4 so somewhere in that range will give you the liters of displacement. Given this a 455 would be approximately 7.4 liters of displacement. Hope that helps a little. Have a good afternoon!
Jake

The 76' T/A came with a 455 and a shaker scoop.

76 also came with 400.. as mine did..with shaker

76 also came with 400.. as mine did..with shaker

76 was the last year for the 455